[ADD][VIM] ALE and linting lighline integration

I changed the theme of lightline's statusline to wombat because the
errors did not have any color using gruvbox.

vim/.vimrc

@@ -122,6 +122,14 @@ Plug 'honza/vim-snippets'
 """"""
 Plug 'rust-lang/rust.vim'
 " }}}
+"
+" LSP {{{
+"""""
+" Asynchronous Linting Engine
+Plug 'dense-analysis/ale'
+" Pre-made ALE integration with lightline
+Plug 'maximbaz/lightline-ale'
+" }}}
 
 call plug#end()
 " }}}
@@ -201,7 +209,7 @@ colorscheme gruvbox
 """"""""""""""""""""
 let g:lightline={}
 " Use the gruvbox colorscheme
-let g:lightline.colorscheme='gruvbox'
+let g:lightline.colorscheme='wombat'
 let g:lightline.active={
   \     'left': [
   \         [ 'mode', 'paste' ],
@@ -212,6 +220,8 @@ let g:lightline.active={
   \         [ 'lineinfo' ],
   \         [ 'percent' ],
   \         [ 'fileformat', 'fileencoding', 'filetype' ],
+  \         [ 'linter_check', 'linter_errors', 'linter_warn', 'linter_ok' ],
+  \         [ 'ctags_status' ],
   \     ]
   \ }
 let g:lightline.inactive={
@@ -228,6 +238,24 @@ let g:lightline.component_function={
   \     'modified': 'LightlineModified',
   \     'gitbranch': 'LightlineFugitive',
   \ }
+let g:lightline.component_expand={
+  \    'linter_check': 'lightline#ale#checking',
+  \    'linter_warn': 'lightline#ale#warnings',
+  \    'linter_errors': 'lightline#ale#errors',
+  \    'linter_ok': 'lightline#ale#ok',
+  \ }
+let g:lightline.component_type={
+  \   'readonly': 'error',
+  \   'linter_checking': 'left',
+  \   'linter_warnings': 'warning',
+  \   'linter_errors': 'error',
+  \   'linter_ok': 'left',
+  \ }
+" Show pretty icons instead of text for linting status
+let g:lightline#ale#indicator_checking='⏳'
+let g:lightline#ale#indicator_warnings='◆'
+let g:lightline#ale#indicator_errors='✗'
+let g:lightline#ale#indicator_ok='✓'
 
 " Lightline function wrappers {{{
 """""""""""""""""""""""""""""