feat!: make conform.nvim and nvim-lint the default formatters/linters

lua/lazyvim/plugins/extras/lang/omnisharp.lua

@@ -13,6 +13,7 @@ return {
     optional = true,
     opts = function(_, opts)
       local nls = require("null-ls")
+      opts.sources = opts.sources or {}
       table.insert(opts.sources, nls.builtins.formatting.csharpier)
     end,
   },