fix: improve file filtering, add new utility,

- Improved the speed of file filtering in `crawl_local_files.py` with folder-level exclusion
- Added `fix_yaml.py` utility for YAML indentation fixes
- Updated `nodes.py` to support up to 20 core abstractions
- add option for no cache.

utils/fix_yaml.py

@@ -0,0 +1,20 @@
+import re
+
+def add_indentation(text):
+    # This pattern matches lines that don't start with a hyphen or whitespace
+    pattern = r'^(?![-\s])(.*)$'
+    
+    # Replace with 4 spaces followed by the captured content
+    result = re.sub(pattern, r'    \1', text, flags=re.MULTILINE)
+    
+    return result
+
+
+if __name__ == "__main__":
+    # Example usage
+    text = """This line will be indented
+    - This line won't be indented
+    This line won't be indented either
+    Another line that will be indented"""
+
+    indented_text = add_indentation(text)