[gemma4] refactor using treesitter

skillls/parser.py

@@ -34,7 +34,7 @@ class SkillParser:
         # Tree-sitter parsing
         tree = self.parser.parse(bytes(content, "utf8"))
         
-        diagnostics: list[Diagnostic] = []
+        diagnostics: list[Diagnostic]  = []
         symbols: list[DocumentSymbol] = []
 
         # Traverse the root node to collect errors and symbols
@@ -75,6 +75,7 @@ class SkillParser:
             if self._is_symbol_node(node):
                 symbol = self._create_document_symbol(node, content)
                 if symbol:
+
                     symbols.append(symbol)
 
             # 3. Continue traversal - push children in reverse order to maintain original DFS order