nixpkgs/neovim: set foldmethod to treesitter

.config/nixpkgs/neovim/settings.lua

@@ -46,3 +46,8 @@ vim.o.inccommand = 'split'
 
 -- disable mouse support
 vim.o.mouse = false
+
+-- set foldexpr to use treesitter
+vim.o.foldmethod = 'expr'
+vim.o.foldexpr = 'nvim_treesitter#foldexpr()'
+vim.o.foldenable = false