Add basic vimrc

basic.vimrc

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+" my basic minimal vimrc for easy installation:
+" curl https://notes.alv.cx/basic.vimrc > ~/.vimrc
+
+set number
+set relativenumber
+set lazyredraw
+set undofile
+set undodir=~/.undodir
+set ignorecase
+
+nnoremap <C-J> <C-W><C-J>
+nnoremap <C-K> <C-W><C-K>
+nnoremap <C-L> <C-W><C-L>
+nnoremap <C-H> <C-W><C-H>
+
+noremap H ^
+noremap L $
+noremap ^ H
+noremap $ L
+
+hi Normal ctermbg=None
+highlight VertSplit cterm=None ctermfg=8 ctermbg=None
+highlight StatusLine cterm=underline ctermfg=8 ctermbg=None
+highlight StatusLineNC cterm=underline ctermfg=8 ctermbg=None
+
+highlight LineNr ctermfg=8 ctermbg=None
+highlight LineNrAbove ctermfg=8 ctermbg=None
+highlight LineNrBelow ctermfg=8 ctermbg=None
+highlight CursorLineNr ctermfg=8 ctermbg=None
+highlight FoldColumn ctermfg=8 ctermbg=None
+highlight SignColumn ctermfg=8 ctermbg=None
+
+au VimEnter,WinEnter,BufWinEnter * setlocal cursorline
+au VimEnter,WinEnter,BufWinEnter * setlocal cursorcolumn
+au WinLeave,BufLeave,BufWinLeave * setlocal nocursorline
+au WinLeave,BufLeave,BufWinLeave * setlocal nocursorcolumn
+
+autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab
+autocmd FileType yml setlocal ts=2 sts=2 sw=2 expandtab