feat: complete monorepo transformation with tools integration

- Add crewai-tools as git subtree preserving full history
- Move tools to proper src/ directory structure with git mv
- Configure tools pyproject.toml for workspace dependency on crewai-core
- Update workspace configuration to include both packages
- Fix build configurations for both packages

packages/tools/src/crewai_tools/rag/chunkers/default_chunker.py

@@ -0,0 +1,6 @@
+from crewai_tools.rag.chunkers.base_chunker import BaseChunker
+from typing import List, Optional
+
+class DefaultChunker(BaseChunker):
+    def __init__(self, chunk_size: int = 2000, chunk_overlap: int = 20, separators: Optional[List[str]] = None, keep_separator: bool = True):
+        super().__init__(chunk_size, chunk_overlap, separators, keep_separator)