feat(mcp): Extract return type hints and ImGui scopes in code outline

tests/test_outline_tool.py

@@ -0,0 +1,42 @@
+import pytest
+import ast
+from pathlib import Path
+from src.outline_tool import CodeOutliner
+
+def test_code_outliner_type_hints():
+    code = """
+class Test:
+    def my_method(self, x: int) -> str:
+        return "hello"
+        
+def my_func(a: bool) -> None:
+    pass
+"""
+    outliner = CodeOutliner()
+    result = outliner.outline(code)
+    assert "[Method] my_method -> str (Lines 3-4)" in result
+    assert "[Func] my_func -> None (Lines 6-7)" in result
+
+def test_code_outliner_imgui_scopes():
+    code = """
+def render_gui() -> None:
+    with imscope.window("My Window"):
+        imgui.text("Hello")
+        with imscope.child("My Child"):
+            pass
+"""
+    outliner = CodeOutliner()
+    result = outliner.outline(code)
+    assert "[ImGui Scope] imscope.window('My Window') (Lines 3-6)" in result
+    assert "[ImGui Scope] imscope.child('My Child') (Lines 5-6)" in result
+
+def test_code_outliner_nested_ifs():
+    code = """
+def render_gui() -> None:
+    if True:
+        with imscope.window("My Window"):
+            pass
+"""
+    outliner = CodeOutliner()
+    result = outliner.outline(code)
+    assert "[ImGui Scope] imscope.window('My Window') (Lines 4-5)" in result