feat: Add comprehensive Godot file type support

Complete support for all Godot file types:
- GDScript (.gd) - Regex-based parser for Godot-specific syntax
- Godot Scenes (.tscn) - Node hierarchy and script attachments
- Godot Resources (.tres) - Properties and dependencies
- Godot Shaders (.gdshader) - Uniforms and shader functions

Implementation details:
- Added 4 new analyzer methods to CodeAnalyzer class
  - _analyze_gdscript(): Functions, signals, @export vars, class_name
  - _analyze_godot_scene(): Node hierarchy, scripts, resources
  - _analyze_godot_resource(): Resource type, properties, script refs
  - _analyze_godot_shader(): Shader type, uniforms, varyings, functions

- Updated dependency_analyzer.py
  - Added _extract_godot_resources() for ext_resource and preload()
  - Fixed DependencyInfo calls (removed invalid 'alias' parameter)

- Updated codebase_scraper.py
  - Added Godot file extensions to LANGUAGE_EXTENSIONS
  - Extended content filter to accept Godot-specific keys
    (nodes, properties, uniforms, signals, exports)

Tested on Cosmic Ideler Godot project:
- 443/452 files successfully analyzed (98%)
- 265 GDScript, 118 .tscn, 38 .tres, 9 .gdshader, 13 .cs

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/skill_seekers/cli/codebase_scraper.py

@@ -69,6 +69,9 @@ LANGUAGE_EXTENSIONS = {
     ".c": "C",
     ".cs": "C#",
     ".gd": "GDScript",  # Godot scripting language
+    ".tscn": "GodotScene",  # Godot scene files
+    ".tres": "GodotResource",  # Godot resource files
+    ".gdshader": "GodotShader",  # Godot shader files
     ".go": "Go",
     ".rs": "Rust",
     ".java": "Java",
@@ -842,7 +845,18 @@ def analyze_codebase(
             analysis = analyzer.analyze_file(str(file_path), content, language)
 
             # Only include files with actual analysis results
-            if analysis and (analysis.get("classes") or analysis.get("functions")):
+            # Check for any meaningful content (classes, functions, nodes, properties, etc.)
+            has_content = (
+                analysis.get("classes")
+                or analysis.get("functions")
+                or analysis.get("nodes")  # Godot scenes
+                or analysis.get("properties")  # Godot resources
+                or analysis.get("uniforms")  # Godot shaders
+                or analysis.get("signals")  # GDScript signals
+                or analysis.get("exports")  # GDScript exports
+            )
+
+            if analysis and has_content:
                 results["files"].append(
                     {
                         "file": str(file_path.relative_to(directory)),