feat: add crewai-tools library to workspace

- Migrate crewai-tools as standalone package in lib/tools
- Configure UV workspace for monorepo structure
- Move assets to repository root
- Clean up duplicate README files
- Focus pre-commit hooks on lib/crewai/src only

lib/tools/src/crewai_tools/rag/chunkers/web_chunker.py

@@ -0,0 +1,20 @@
+from crewai_tools.rag.chunkers.base_chunker import BaseChunker
+from typing import List, Optional
+
+
+class WebsiteChunker(BaseChunker):
+    def __init__(self, chunk_size: int = 2500, chunk_overlap: int = 250, separators: Optional[List[str]] = None, keep_separator: bool = True):
+        if separators is None:
+            separators = [
+                "\n\n\n",  # Major section breaks
+                "\n\n",    # Paragraph breaks
+                "\n",      # Line breaks
+                ". ",      # Sentence endings
+                "! ",      # Exclamation endings
+                "? ",      # Question endings
+                "; ",      # Semicolon breaks
+                ", ",      # Comma breaks
+                " ",       # Word breaks
+                "",        # Character level
+            ]
+        super().__init__(chunk_size, chunk_overlap, separators, keep_separator)