feat: Add Firebase Functions plugin

[jjgriff93]

Plugin(s)

• Analytics
• App
• App Check
• Authentication
• Crashlytics
• Cloud Firestore
• Cloud Messaging
• Cloud Storage
• Performance
• Remote Config

Current problem

Would love to be able to use Firebase entirely natively on my Capacitor app, and the only missing piece from this great repo is Functions support!

Preferred solution

A new plugin for Firebase Functions that covers the key client-side methods across native and web. This would include:

• Web SDK: https://firebase.google.com/docs/reference/js/functions
• iOS SDK: https://firebase.google.com/docs/reference/swift/firebasefunctions/api/reference/Classes
• Android SDK: https://firebase.google.com/docs/reference/android/com/google/firebase/functions/package-summary

Alternative options

No response

Additional context

No response

Before submitting

• I have read and followed the feature request guidelines.
• I have attached links to possibly related issues and discussions.

[robingenz]

@jjgriff93 Would you be willing to test a dev version?

[jjgriff93]

@robingenz absolutely! And happy to contribute if helpful

[robingenz]

@jjgriff93 That would be great because I am currently unable to deploy a cloud function. 😅 I tried it for several hours now with different firebase-tools versions.

Error: Cloud Runtime Config is currently experiencing issues, which is preventing your functions from being deployed. Please wait a few minutes and then try to deploy your functions again.
Run `firebase deploy --except functions` if you want to continue deploying the rest of your project.

I've just published a dev version for testing:

npm i @capacitor-firebase/functions@6.0.0-dev.b96fa6c.1718781196

If you discover any bugs, it would be great if you could create a PR against feat/issue-640. Let me know if you have any questions.

[robingenz]

@jjgriff93 Did you had a chance to test the plugin?