fix: formatexpr with lsp changed

we need to adapt to it

nix/base-system/init.lua

@@ -20,6 +20,10 @@ vim.opt.fileformats = "unix,dos"
 -- Recommended by Avante docs
 -- views can only be fully collapsed with the global statusline
 vim.opt.laststatus = 3
+-- formatexpr defaulted to the lsp provider by default recently
+-- which breaks `gq` and company paragraph formatting in non lsp
+-- contexts.
+vim.opt.formatexpr = ""
 
 vim.g.BASH_AuthorName = 'Jeremy Wall'
 vim.g.BASH_AuthorRef = 'jw'
@@ -256,6 +260,10 @@ vim.api.nvim_create_autocmd('LspAttach', {
         if client and client.server_capabilities.codelens then
             vim.lsp.codelens.refresh()
         end
+        -- formatexpr defaulted to the lsp provider by default recently
+        -- which breaks `gq` and company paragraph formatting in non lsp
+        -- contexts.
+        vim.bo[args.buf].formatexpr = ""
     end,
 })