feat(vim-plugins): Delete unmaintained plugin for (Neo)Vim

indentLine has had support dropped since mid-2023.  There is no
replacement that works on both Neovim and Vim; but almost the same
behavior can be achieved with `listchars` and some autocmd magic.

So the plugin is getting removed as dependency from this repo.

.gitmodules

@@ -23,11 +23,6 @@
 	url = https://github.com/tomasiser/vim-code-dark.git
 	shallow = true
 	ignore = all
-[submodule "vim/pack/misc/start/indentLine"]
-	path = vim/pack/misc/start/indentLine
-	url = https://github.com/Yggdroot/indentLine.git
-	shallow = true
-	ignore = all
 [submodule "vim/pack/misc/start/auto-pairs"]
 	path = vim/pack/misc/start/auto-pairs
 	url = https://github.com/jiangmiao/auto-pairs.git

nvim/init.vim

@@ -13,7 +13,12 @@ set cursorline
 set tabstop=4 shiftwidth=4
 set softtabstop=-1  " Negative value sets to use "shiftwidth" instead
 
-set list listchars=tab:→ ,trail:·,lead:·
+set list listchars=tab:→ ,trail:·,leadmultispace:⦙···
+if has('autocmd')
+	autocmd OptionSet shiftwidth execute
+		\ 'setlocal listchars=tab:→ ,trail:·,'
+		\ . 'leadmultispace:⦙' . repeat('·', &sw - 1)
+endif
 let &colorcolumn = join(range(80+1, 256), ',')
 
 set clipboard+=unnamed,unnamedplus
@@ -33,7 +38,6 @@ endif
 
 " Extras
 let g:vimsyn_embed = 'Pl'
-let g:indentLine_char = '⦙'
 
 runtime! **/lsp/init.lua
 

nvim/pack/misc/start/indentLine

@@ -1 +0,0 @@
-../../../../vim/pack/misc/start/indentLine

vim/pack/misc/start/indentLine

@@ -1 +0,0 @@
-Subproject commit d15d63bf9c4a74a02470d4bc8ecce53df13e3a75

vim/vimrc

@@ -14,7 +14,12 @@ set cursorline
 set tabstop=4 shiftwidth=4
 set softtabstop=-1  " Negative value sets to use "shiftwidth" instead
 
-set list listchars=tab:→ ,trail:·,lead:·
+set list listchars=tab:→ ,trail:·,leadmultispace:⦙···
+if has('autocmd')
+	autocmd OptionSet shiftwidth execute
+		\ 'setlocal listchars=tab:→ ,trail:·,'
+		\ . 'leadmultispace:⦙' . repeat('·', &sw - 1)
+endif
 let &colorcolumn = join(range(80+1, 256), ',')
 
 set directory^=~/.local/share/vim/swap//
@@ -35,7 +40,6 @@ endif
 
 " Extras
 let g:vimsyn_embed = 'Pl'
-let g:indentLine_char = '⦙'
 
 runtime! lsp.vim