Update gdscript queries (#4405)

* locals(gdscript): update locals

* folds(gdscript): add folds

* indents(gdscript): update indents with notes

* highlights(gdscript): update highlights

* docs(gdscript): add gdscript maintainer

* indents(gdscript): add ERROR auto indent

Co-authored-by: Amaan Qureshi <amaanq12@gmail.com>

* highlights(gdscript): use text.uri for get_node and node_path

* highlights(gdscript): add "@" of annotation as attribute

* highlights(gdscript): use keyword.operator for "new", match all attribute_call

* highlights(gdscript): update (underscore) and (pattern_open_ending)

---------

Co-authored-by: Amaan Qureshi <amaanq12@gmail.com>

queries/gdscript/folds.scm

@@ -0,0 +1,25 @@
+[
+  ; Body fold will "join" the next adjacent fold into a SUPER fold.
+  ; This is an issue with the grammar.
+  ; (body)
+
+  (if_statement)
+  (elif_clause)
+  (else_clause)
+  (for_statement)
+  (while_statement)
+  (class_definition)
+  (enum_definition)
+  (match_statement)
+  (pattern_section)
+  (function_definition)
+  (lambda)
+  (constructor_definition)
+] @fold
+
+; It's nice to be able to fold the if/elif/else clauses and the entire
+; if_statement.
+(if_statement (body) @fold)
+
+; Fold strings that are probably doc strings.
+(expression_statement (string) @fold)