* Add LspPeekDefinition
* Add documentation
* Add lsp-peek-definition mapping to documentation
* Add link to Vim preview-window help
* Rewrite LspPeekDefinition using preview window
* Implement peek for Vim popup window
* Make LspPeekDefinition work in Neovim
* Support align in Neovim
* Fix linter errors
* Extract duplicate code to s:align_preview function
* Merge setlocal settings in one line
* Remove suppress_close
* Clean up cursor movement for preview window
* Move Neovim cursor code to separate function
* Allow customising peek alignment
* Move Vim alignment code to separate function
* Implement Vim alignment of popup window
* Cleanup
* Remove extraneous lines
* Move set_cursor logic
* Move scrolloff setting
* Make function calls a bit more consistent
* Vim popup window fixes
* Remove extraneous call
* Fix Vim alignment
* Remove hardcoded width
* Add abort to closure function
* Fix artifacts
* Fix wrong height if popup above cursor
* Add remaining Peek commands
Add LspPeekImplementation, LspPeekTypeDefinition and LspPeekDeclaration.
* Fix wrong positioning of Vim popup
Currently calling hover on a filetype without support throws an error, stating
that 'Unknown function: <SNR>274_not_supported'. This adds the `not_supported`
function into the scripts' scope.
