enable more completion sources

config/default.nix

@@ -150,9 +150,9 @@
         settings = {
             sources = [
                 { name = "nvim_lsp"; }
-#                { name = "path"; }
+                { name = "path"; }
-#                { name = "buffer"; }
+                { name = "buffer"; }
-#                { name = "luasnip"; }
+                { name = "luasnip"; }
 #                { name = "cmdline"; }
             ];