feat: major enhancement to ChromaDB MCP Server functionality

This commit introduces several substantial improvements to the ChromaDB MCP Server:

MODULE RESTRUCTURING:

- Renamed module from 'chroma' to 'chroma_mcp' to avoid conflicts with official ChromaDB package

- Updated entry point in pyproject.toml

- Created data migration utility script to assist with transitioning from old path structure

COLLECTION MANAGEMENT:

- Added create_collection tool for organizing documents into named collections

- Added list_collections tool to view all available collections

- Added delete_collection tool for removing collections

BULK OPERATIONS:

- Implemented bulk_create_documents for efficiently adding multiple documents in a single operation

- Optimized for performance when adding large document sets

ENHANCED SEARCH CAPABILITIES:

- Added hybrid_search combining semantic and keyword search with configurable weights

- Implemented multi_query_search allowing searches with multiple queries and result aggregation

- Added support for both union and intersection aggregation methods

DOCUMENT VERSIONING SYSTEM:

- Created comprehensive document versioning system on top of ChromaDB

- Added create_document_version for tracking changes to documents over time

- Added list_document_versions to view version history with timestamps and notes

- Added get_document_version to retrieve specific document versions including 'latest'

- Implemented version metadata tracking with original document references

MISCELLANEOUS:

- Improved error handling with specific error messages for new operations

- Updated README with comprehensive documentation

- Added ChromaDB logo alongside HumainLabs.ai branding

Author: scalabl3

.gitignore

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