feat: add @signaldb/electron integration package

[poeck]

Add an IPC bridge that lets Electron renderer processes use reactive Collections backed by persistence adapters running in the main process.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d2dccec) to head (dd18406).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##              main     #2657    +/-   ##
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  Coverage   100.00%   100.00%            
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  Files           56        60     +4     
  Lines         1866      1998   +132     
  Branches       444       456    +12     
==========================================
+ Hits          1866      1998   +132     

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[codecov]

Bundle Report

Changes will increase total bundle size by 36.14kB (0.48%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@signaldb/electron	36.14kB	36.14kB (100%) ⬆️

[maxnowack]

Thanks for your PR! Quick question: why not just using a custom persistence adapter that handles the IPC communication combined with some receiver side in the main process?

[poeck]

I think the main advantage of this approach is that it gives you access to the collection in both the main process and the renderer process. If it were just a persistence adapter in the renderer, accessing it from the main process would be much more difficult, which is probably quite common. I would also need this for my use case, so I'd prefer this approach.

[poeck]

I'll try to implement this in my own project and do some more testing there, but I think it's now ready for review 👍🏻