Added tag filtering for knowledge base files

[verigle]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

There are many knowledge base files, which are inconvenient to retrieve, and I hope to add tags or folder management functions，this makes it easy to filter and manage files

2. Additional context or comments

No response

3. Can you help us with this feature?

• [ ] I am interested in contributing to this feature.