feat(treesitter): replace nvim-treesitter with pack-managed parsers

queries/cpp/folds.scm

@@ -0,0 +1,16 @@
+; SPDX-License-Identifier: Apache-2.0
+; Source: nvim-treesitter (https://github.com/nvim-treesitter/nvim-treesitter)
+; inherits: c
+
+[
+  (for_range_loop)
+  (class_specifier)
+  (field_declaration
+    type: (enum_specifier)
+    default_value: (initializer_list))
+  (template_declaration)
+  (namespace_definition)
+  (try_statement)
+  (catch_clause)
+  (lambda_expression)
+] @fold