Add support for FalkorDB Graph database alongside Neo4j usage

[galshubeli]

[!IMPORTANT] Add support for FalkorDB as an alternative to Neo4j, including configuration, examples, and core functionality updates.

• Database Support:
  • Adds support for FalkorDB alongside Neo4j in graphiti_core/driver.py.
  • Introduces Driver class to abstract database interactions.
  • Updates .env.example and README.md to include FalkorDB configuration.
• Examples:
  • Adds quickstart_falkordb.py for FalkorDB usage.
  • Renames quickstart.py to quickstart_neo4j.py.
  • Updates examples/quickstart/README.md to reflect FalkorDB support.
• Code Changes:
  • Modifies graphiti_core/edges.py, graphiti_core/nodes.py, and graphiti_core/search/search.py to use the new Driver class.
  • Updates graphiti_core/graph_queries.py to generate queries for both Neo4j and FalkorDB.
  • Adjusts graphiti_core/utils/bulk_utils.py and graphiti_core/utils/maintenance modules for compatibility with both databases.
• Miscellaneous:
  • Adds falkordb dependency in pyproject.toml.
  • Updates CONTRIBUTING.md for environment setup changes.

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[danielchalef]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[dudizimber]

I have read the CLA Document and I hereby sign the CLA

[galshubeli]

I have read the CLA Document and I hereby sign the CLA

[danielchalef]

This is awesome. Thanks for contributing. Please allow @prasmussen15 and team some time to review and comment. Thank you!

[prasmussen15]

I took a look at the PR and I agree with the approach! I still have to run tests locally before merging though

[galshubeli]

@prasmussen15 can you approve the workflow?

[prasmussen15]

Hey, closing this PR since I merged in these commits along with a few MyPy/linter fixes and a different abstraction methodology.