feat: comprehensive query files for all block types and VAR sections (Phase 3)

Update all 5 tree-sitter query files to cover the full grammar:

highlights.scm:
- Add highlights for new literals (binary, octal, date, bool, typed_int,
  wstring, char)
- Add highlights for block names (organization_block, function_block,
  function, data_block, type_definition)
- Add highlights for return_statement, goto_statement, title_statement
- Add highlights for bit_access, method_callee
- Add compound assignment operators (+=, -=, *=, /=, etc.)

indents.scm:
- Add function, type_definition, data_block to @indent.begin
- Add all var_*_declaration variants to @indent.begin
- Add struct_type to @indent.begin
- Add END_FUNCTION, END_TYPE, END_DATA_BLOCK, END_STRUCT to @indent.end

folds.scm:
- Add function, type_definition, data_block to @fold
- Add all var_*_declaration variants to @fold
- Add struct_type to @fold

locals.scm:
- Add function, type_definition, data_block as @local.scope
- Add all var_*_declaration variants as @local.scope
- Add struct_type as @local.scope
- Add block name definitions (@definition.function, @definition.class,
  @definition.type)
- Narrow @reference to prefixed_identifier only (reduces noise)

tags.scm:
- Add function, data_block, type_definition tags
- Add FB call references
- Add region_statement as @definition.module

queries/scl/folds.scm

@@ -3,12 +3,21 @@
 [
   (organization_block)
   (function_block)
+  (function)
+  (type_definition)
+  (data_block)
   (var_declaration)
+  (var_temp_declaration)
+  (var_constant_declaration)
+  (var_retain_declaration)
+  (var_non_retain_declaration)
+  (var_db_specific_declaration)
   (if_statement)
   (case_statement)
   (for_statement)
   (while_statement)
   (repeat_statement)
   (region_statement)
+  (struct_type)
   (block_comment)
 ] @fold