[Community Goal 2026] [S1] Move asyncapi/diff into asyncapi/cli

[princerajpoot20]

Move this repo to CLI.

Description:

TBD

Reference:

• Parent issue: Proposal: Move diff, bundler, and optimizer into CLI #226
  Proposal: Move diff, bundler, and optimizer into CLI cli#2251

Currently waiting for:

• Proposal: Move diff, bundler, and optimizer into CLI cli#2251 (comment)
• The remaining maintainer's approval.

[princerajpoot20]

I will be working on this issue.