feat(Neovim/vim): Set VSCode Dark+ as default colorscheme

Set in both editors the VSCode theme Dark+ variant.  Each editor uses a
plugin built specifically for it, because Neovim's is written in Lua and
Vim's doesn't provide TreeSitter support.

nvim/ginit.vim

@@ -15,3 +15,11 @@ let g:onedark_config = {'transparent': v:false}
 if exists('g:colors_name') && g:colors_name == 'onedark'
 	syntax reset
 endif
+if exists('g:colors_name') && g:colors_name == 'vscode'
+	let g:vscode_transparent = v:false
+lua <<EOF
+	local c = require('vscode.colors').get_colors()
+	require('vscode').setup({ group_overrides = { Normal = { fg=c.vscFront, bg=c.vscBack } } })
+	require('vscode').load()
+EOF
+endif

nvim/init.vim

@@ -64,6 +64,10 @@ let g:aldmeris_termcolors = 'tango'
 let g:onedark_config = {'transparent': v:true}
 let g:onedark_terminal_italics = v:true
 
+let g:vscode_style = 'dark'
+let g:vscode_transparent = v:true
+let g:vscode_italic_comment = v:true
+
 " onedark.vim override: Don't set a background color when running in a
 " terminal; just use the terminal's background color
 if has('autocmd') && !has('gui_running')
@@ -74,13 +78,17 @@ if has('autocmd') && !has('gui_running')
 	augroup END
 endif
 
-silent! colorscheme onedark
+silent! colorscheme vscode
 
-if exists('g:colors_name') && g:colors_name == 'onedark'
+if exists('g:colors_name') && (g:colors_name == 'onedark'
+                             \ || g:colors_name == 'vscode')
 	if has('termguicolors')
 		set termguicolors
 	endif
 endif
+if exists('g:colors_name') && g:colors_name == 'vscode'
+	let g:airline_theme = 'codedark'  " vscode.nvim doesn't provide one
+endif
 
 " Misc
 let g:airline#extensions#tabline#enabled = v:true

vim/vimrc

@@ -55,6 +55,8 @@ let g:aldmeris_termcolors = 'tango'
 
 let g:onedark_terminal_italics = v:true
 
+let g:codedark_italics = v:true
+
 " onedark.vim override: Don't set a background color when running in a
 " terminal; just use the terminal's background color
 if has('autocmd') && !has('gui_running')
@@ -63,12 +65,13 @@ if has('autocmd') && !has('gui_running')
 		autocmd ColorScheme onedark silent!
 			\ call onedark#extend_highlight('Normal', {'bg': {'gui': 'NONE'}})
 	augroup END
+	let g:codedark_transparent = v:true
 endif
 
-packadd onedark.vim  " Fix because Vim ignores the start dir for this package
-silent! colorscheme onedark
+silent! colorscheme codedark
 
-if exists('g:colors_name') && g:colors_name == 'onedark'
+if exists('g:colors_name') && (g:colors_name == 'onedark'
+                             \ || g:colors_name == 'codedark')
 	if has('termguicolors')
 		set termguicolors
 		if !empty($TMUX) && (&term =~ 'tmux' || &term =~ 'screen')