feat: enhance CLI usability with improved shell

[xiaofan-luan]

• Implement OutputFormatter for global output control (table, json, csv).
• Upgrade interactive shell with prompt_toolkit for syntax highlighting and better history.
• Add persistent connection history management (list/delete connection_history).
• Standardize help documentation and interactive prompts for core commands.
• Enable dynamic auto-completion for collections and databases.
• Add integration tests for new output and completion features.

[nameczz]

Hi ,@xiaofan-luan
I've resolved the conflicts from the previously merged PR #107 and also removed the truncate_collection and wait_for_loading_complete methods. After checking the Milvus client documentation, these methods are not available in the Milvus client API.

This PR now has multiple merge conflicts due to the recent changes.
Would you be able to help with resolving these conflicts, or should I proceed with the conflict resolution?

[xiaofan-luan]

Hi ,@xiaofan-luan I've resolved the conflicts from the previously merged PR #107 and also removed the truncate_collection and wait_for_loading_complete methods. After checking the Milvus client documentation, these methods are not available in the Milvus client API.

This PR now has multiple merge conflicts due to the recent changes. Would you be able to help with resolving these conflicts, or should I proceed with the conflict resolution?

This is under release, pymilvus already support.
But don't worry, I will do a rebase. there will be several other improvements as well