[Docs/Website] API Key handling instructions update in contribution guides

[vedansh-5]

Description

Currently, the documentation does not clearly specify how API keys should be handled within the project when contributing a new tool. This can cause confusion for contributors implementing API-based tools.

Affected Areas

Check all that apply:

• Documentation files (docs/)
• Website content (website/)
• Both

[rawkintrevo]

To clarify, are you saying Appendix B is insufficient? Or do we need to call it out so people see it?

[vedansh-5]

We do not need the .env file.
Need to add documentation about adding the API key during class initialization and about CI/CD testing.