Local Taxonomy features to the current experimental feature

[nerdalert]

• Provide the user the ability to select an existing taxonomy from a base directory. I don't know that we need to check if the directory is a taxonomy for now, just the raw path. Ideally a popup starting at the base directory.
• We support initializing a new clone from an upstream repo. Up to the user would need to ensure its a fork etc.
• Add knowledge file support. We need to replicate how the SaaS handles knowledge files for now. There needs to be a new repo initialized for knowledge docs and still create an attribution.txt file until this changes upstream to a more streamlined doc ingestion into a vectordb.