[UX] Add Romanian keyboard layout (#5660)

This adds a new separate Romanian keyboard layout, with popup support.

- Functional buttons are translated.
- Pages 5&6 contain 3 groups of characters (I tried my best to group them logically):
  - On the left: traditional Romanian cyrillic pre-1850s
  - On the middle latinised forms from 1850s onwards
  - On the right modern diacritics from 1900s to today
- Pages 7&8 add only large double quotes and section/paragraph mark.
- Popups are only avalable for most common diacritics. Swipe up for circumflex, swipe down for breve.

I can really call this the most complete though-the-ages Romanian keyboard. :)

frontend/ui/data/keyboardlayouts/keypopup/ro_popup.lua

@@ -0,0 +1,46 @@
+return {
+    _A_ = {
+        "A",
+        north = "Â",
+        south = "Ă",
+    },
+    _a_ = {
+        "a",
+        north = "â",
+        south = "ă",
+    },
+    _I_ = {
+        "I",
+        north = "Î",
+        south = "Ĭ",
+    },
+    _i_ = {
+        "i",
+        north = "î",
+        south = "ĭ",
+    },
+    _S_ = {
+        "S",
+        north = "Ș",
+    },
+    _s_ = {
+        "s",
+        north = "ș",
+    },
+    _T_ = {
+        "T",
+        north = "Ț",
+    },
+    _t_ = {
+        "t",
+        north = "ț",
+    },
+    _U_ = {
+        "U",
+        south = "Ŭ",
+    },
+    _u_ = {
+        "u",
+        south = "ŭ",
+    },
+}

frontend/ui/data/keyboardlayouts/ro_keyboard.lua

@@ -0,0 +1,86 @@
+local en_popup = require("ui/data/keyboardlayouts/keypopup/en_popup")
+local ro_popup = require("ui/data/keyboardlayouts/keypopup/ro_popup")
+local com = en_popup.com -- comma (,)
+local prd = en_popup.prd -- period (.)
+local _at = en_popup._at
+local _eq = en_popup._eq -- equals sign (=)
+local _A_ = ro_popup._A_
+local _a_ = ro_popup._a_
+local _I_ = ro_popup._I_
+local _i_ = ro_popup._i_
+local _S_ = ro_popup._S_
+local _s_ = ro_popup._s_
+local _T_ = ro_popup._T_
+local _t_ = ro_popup._t_
+local _U_ = ro_popup._U_
+local _u_ = ro_popup._u_
+
+return {
+    min_layer = 1,
+    max_layer = 8,
+    shiftmode_keys = {[""] = true},
+    symbolmode_keys = {["123"] = true, ["ABC"] = true, ["alt"] = true},
+    utf8mode_keys = {["🌐"] = true},
+    umlautmode_keys = {["Îșț"] = true},
+    keys = {
+        -- first row
+        {  --  1       2       3       4       5       6       7       8
+            { "Q",    "q",    "„",    "0",    "Ӂ",    "ӂ",    "1",    "ª", },
+            { "W",    "w",    "!",    "1",    "Џ",    "џ",    "2",    "º", },
+            { "E",    "e",    _at,    "2",    "Ѫ",    "ѫ",    "3",    "¡", },
+            { "R",    "r",    "#",    "3",    "Ꙟ",    "ꙟ",    "4",    "¿", },
+            { _T_,    _t_,    "+",    _eq,    "Ѧ",    "ѧ",    "5",    "¼", },
+            { "Y",    "y",    "€",    "(",    "Ô",    "ô",    "6",    "½", },
+            { _U_,    _u_,    "‰",    ")",    "Ḑ",    "ḑ",    "7",    "¾", },
+            { _I_,    _i_,    "|",   "\\",    "Ĕ",    "ĕ",    "8",    "©", },
+            { "O",    "o",    "?",    "/",    "Ă",    "ă",    "9",    "®", },
+            { "P",    "p",    "~",    "`",    "Î",    "î",    "0",    "™", },
+        },
+        -- second row
+        {  --  1       2       3       4       5       6       7       8
+            { _A_,    _a_,    "…",    _at,    "Ї",    "ї",    "«",    "«", },
+            { _S_,    _s_,    "$",    "4",    "Ѡ",    "ѡ",    "»",    "»", },
+            { "D",    "d",    "%",    "5",    "Є",    "є",    "Ǧ",    "ǧ", },
+            { "F",    "f",    "^",    "6",    "Ꙋ",    "ꙋ",    "Ć",    "ć", },
+            { "G",    "g",    ":",    ";",    "Û",    "û",    "Č",    "č", },
+            { "H",    "h",    '"',    "'",    "Ê",    "ê",    "Đ",    "đ", },
+            { "J",    "j",    "{",    "[",    "Ș",    "ș",    "Š",    "š", },
+            { "K",    "k",    "}",    "]",    "Ț",    "ț",    "Ž",    "ž", },
+            { "L",    "l",    "_",    "-",    "Â",    "â",    "§",    "§", },
+        },
+        -- third row
+        {  --  1       2       3       4       5       6       7       8
+            { label = "",
+              width = 1.5
+            },
+            { "Z",    "z",    "&",    "7",    "Ѣ",    "ѣ",    "Ű",    "ű", },
+            { "X",    "x",    "*",    "8",    "Ѩ",    "ѩ",    "Ã",    "ã", },
+            { "C",    "c",    "£",    "9",    "Ѥ",    "ѥ",    "Þ",    "þ", },
+            { "V",    "v",    "<",    com,    "Ó",    "ó",    "Ý",    "ý", },
+            { "B",    "b",    ">",    prd,    "É",    "é",    "†",    "‡", },
+            { "N",    "n",    "‘",    "↑",    "Ŭ",    "ŭ",    "–",    "—", },
+            { "M",    "m",    "’",    "↓",    "Ĭ",    "ĭ",    "…",    "¨", },
+            { label = "",
+              width = 1.5,
+              bold = false
+            },
+        },
+        -- fourth row
+        {
+            { "123",  "123",  "ABC",  "ABC",  "alt",  "alt",  "ABC",  "ABC",
+              width = 1.5},
+            { label = "🌐", },
+            { "Îșț",  "Îșț",  "Îșț",  "Îșț",  "Îșț",  "Îșț",  "Îșț",  "Îșț", },
+            { label = "spațiu",
+              " ",    " ",    " ",    " ",    " ",    " ",    " ",    " ",
+              width = 3.0},
+            { com,    com,    "“",    "←",    "Ç",   "ç",    com,    com, },
+            { prd,    prd,    "”",    "→",    "Ŏ",   "ŏ",    prd,    prd, },
+            { label = "⮠",
+              "\n",   "\n",   "\n",   "\n",   "\n",   "\n",   "\n",   "\n",
+              width = 1.5,
+              bold = true
+            },
+        },
+    },
+}

frontend/ui/language.lua

@@ -25,6 +25,8 @@ local Language = {
         pl_PL = "Polski2",
         pt_PT = "Português",
         pt_BR = "Português do Brasil",
+        ro = "Română",
+        ro_MD = "Română (Moldova)",
         sk = "Slovenčina",
         sv = "Svenska",
         vi = "Tiếng Việt",
@@ -96,6 +98,8 @@ function Language:getLangMenuTable()
                 --self:genLanguageSubItem("pl_PL"),
                 self:genLanguageSubItem("pt_PT"),
                 self:genLanguageSubItem("pt_BR"),
+                --self:genLanguageSubItem("ro"),
+                --self:genLanguageSubItem("ro_MD"),
                 self:genLanguageSubItem("sk"),
                 self:genLanguageSubItem("sv"),
                 self:genLanguageSubItem("vi"),

frontend/ui/widget/virtualkeyboard.lua

@@ -661,6 +661,7 @@ local VirtualKeyboard = FocusManager:new{
         he = "he_keyboard",
         ja = "ja_keyboard",
         pt_BR = "pt_keyboard",
+        ro = "ro_keyboard",
         ko_KR = "ko_KR_keyboard",
         ru = "ru_keyboard",
     },