feat: add local Firebase Emulator support

[re1sub]

Summary

• Detect running Firebase Local Emulator instances by scanning hub files in the OS temp directory
• Add emulator-aware backend paths in auth, firestore, and storage controllers (REST API with Bearer owner)
• Introduce emulator as a third authMethod in Redux state with full persistence support
• Add a "Local Emulator" tab in the connection dialog showing detected emulators with one-click connect
• Group emulator projects in a dedicated sidebar section with "Open in Emulator UI" context menu action
• Make auth, storage, collection, and console features emulator-aware with proper reconnection logic
• Route "Open in Console" actions to the Emulator UI for emulator projects vs Firebase Console for real projects

Test plan

• Launch Firebase Emulators and verify they appear in the connection dialog
• Connect to an emulator project and verify collections, auth users, and storage files load correctly
• Close and reopen the app — verify emulator project reconnects automatically
• Verify service account and Google Sign-In connection methods still work unchanged
• Verify context menu shows "Open in Emulator UI" for emulator projects and "Reveal in Firebase Console" for real projects

References #4

[re1sub]

I'll fix the formatting issues. Also, will need to update the README. Should I do it or you prefer to do it yourself @flowdeskadmin ?

[flowdeskadmin]

Could you handle it?
Appreciate your help

[re1sub]

Could you handle it? Appreciate your help

Updated the README. I'll leave the website update to you.

You might wanna update or automate the version badge on the website with a script that fetches the latest release version from github

[flowdeskadmin]

Got it. Thank you for you contribution

[flowdeskadmin]

👍

[re1sub]

Happy to help. I was looking for exactly this program. Thank you!

Waiting patiently for the release :)