7415 serverless functions update environment variables in a dedicated tab in settings functions not a env file

[martmull]

[greptile-apps]

PR Summary

This pull request introduces significant updates to the serverless functions management system, particularly focusing on environment variables handling and version management. Here are the key changes:

• Added a new 'publishedVersions' field to track multiple versions of serverless functions
• Implemented a dedicated tab for managing environment variables in the serverless function settings UI
• Updated GraphQL queries and mutations to support new serverless function management features
• Modified the backend to handle the new 'publishedVersions' column and updated environment variables storage
• Refactored the serverless function service to use TypeORM repository methods directly

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[Devessier]

Great job, @martmull! I love the new UX.

I have a few questions to understand the future of this feature:

• As far as I understand, the environment variables are still stored in a .env file; will we keep it in the future? I remember that we talked about moving it to the database, that's maybe something we'll do in a second step?
• Regarding storing environment variables, in the database, do we already have a plan for encryption?