Feature Area: Documentation

Is your feature request related to an existing bug? Please link it here.
NA

Describe the solution you'd like
There should be clear and comprehensive documentation for using a custom pgvector as the knowledge storage in CrewAI. This should include setup instructions, configuration details, example use cases, and troubleshooting tips for users who want to use or integrate a custom pgvector database as their knowledge storage backend.

Describe alternatives you've considered
I tried searching the existing documentation and repository wiki, but could not find detailed information about configuring or using a custom pgvector as the knowledge storage.

Additional context
Proper documentation will help users and contributors effectively use, configure, and extend CrewAI with a custom pgvector knowledge storage option.

Willingness to Contribute:
I can test the feature once it's implemented.