feat(app-store): add feishu calendar

[techknowlogick]

What does this PR do?

Re-Open #13089 without yarn.lock added. cc: @PeerRich

Type of change

• New feature (non-breaking change which adds functionality)

How should this be tested?

• Are there environment variables that should be set?
• What are the minimal test data to have?
• What is expected (happy path) to have (input and output)?
• Any other important info that could help to test that PR

Mandatory Tasks

• [x] Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

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[techknowlogick]

@PeerRich for cal.com, new creds will need to be set for the alternate endpoint. I can assist in getting those for you if needed

[PeerRich]

hey @techknowlogick how do i optain these keys?