Artem Chikin e3f07a58f5 [Diagnostics] Display full diagnostic group parent chains ...

When a diagnostic belongs to a group that has a parent group (`GROUP_LINK` in `DiagnosticGroups.def`), display the full inheritance chain in the diagnostic output, including documentation hyperlinks and footnotes for each.

For example, a diagnostic in `ExistentialType` (child of `PerformanceHints`) now renders as:
```
warning: ... [#PerformanceHints::ExistentialType]
```
Groups without parents continue to display as before (`[#DeprecatedDeclaration]`).

Resolves rdar://170805800

2026-03-16 10:04:10 +00:00

..

array-ret.swift

[Diagnostics] Display full diagnostic group parent chains

2026-03-16 10:04:10 +00:00

existential-any.swift

[Performance Hints] Issue diagnostic for code wrapped in implicit nodes

2025-10-07 21:46:16 -07:00

untyped-throws.swift

Split out the Fix-It for the untyped throws performance hint

2026-03-13 13:33:57 -07:00