[NVIM] Rework folding

nvim/init.vim

@@ -329,16 +329,16 @@ let g:UltiSnipsEditSplit="vertical"
 set rtp+=~/.config/nvim/my-snippets
 
 " Folding
-set foldmethod=syntax
+set foldmethod=indent
 set foldlevel=100
-" Use F9 to toggle folding
+" Use F9 or <Leader>z to toggle folding
 inoremap <F9> <C-O>za
 nnoremap <F9> za
 onoremap <F9> <C-C>za
 vnoremap <F9> zf
-nnoremap <Leader>a za
-onoremap <Leader>a <C-C>za
-vnoremap <Leader>a zf
+nnoremap <Leader>z za
+onoremap <Leader>z <C-C>za
+vnoremap <Leader>z zf
 
 try
     source ~/.config/nvim/.vimrc_config_expand_region