neovim: update base configuration

pkgsets/nvim.nix

@@ -22,19 +22,21 @@ with lib;
     luaRcContent = # lua
       ''
         vim.g.mapleader = " "
-        vim.opt.tabstop = 2
-        vim.opt.shiftwidth = 2
-        vim.opt.expandtab = true
-        vim.opt.ignorecase = true
-        vim.opt.smartcase = true
-        -- TODO: fix option name
-        -- vim.opt.nformats = alpha
+        vim.o.tabstop = 2
+        vim.o.shiftwidth = 2
+        vim.o.expandtab = true
+        vim.o.ignorecase = true
+        vim.o.smartcase = true
+        vim.o.nrformats = alpha
         vim.bo.softtabstop = 2
+        vim.wo.foldmethod = 'expr'
+        vim.wo.foldexpr = 'nvim_treesitter#foldexpr()'
+        vim.o.foldlevelstart = 99
 
         vim.wo.number = true
         vim.wo.relativenumber = true
 
-        vim.opt.scrolloff = 10
+        vim.o.scrolloff = 20
       '';
   };
 }