feat: support cli for dev mode

[bytecii]

Description

• Basic support for the eigent cli (for dev mode) more details please refer to cli/README.md
  • now need to use npm run dev to start the backend
• Also enable specifying the workspace dynamically
  More interactive actions

Testing Evidence (REQUIRED)

• I have included human-verified testing evidence in this PR.
• This PR includes frontend/UI changes, and I attached screenshot(s) or screen recording(s).
• No frontend/UI changes in this PR.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

[4pmtong]

Thanks @bytecii I'll review it ASAP