Improve PWA Support

[RayBB]

Would you be open to improving PWA support?

At the least, adding support for caching the images/styles would be nice.

There could be a world where new items can be added "offline" and pushed when online.

My request mainly comes from the pain of using the site on very slow (basically 3g) mobile data.

I don't have much experience with next or pwas but did some research and it seems like this tool is the current go-to for the combo and wouldn't be too hard to setup. https://serwist.pages.dev/

[RayBB]

@scastiel inspired by the recent blog post and how much I use this app I was wondering again if you'd be interested in a PR for local-first support. Ofcourse trying to keep the changes minimal but I think it's doable.

[scastiel]

Hey @RayBB, it turns out I'm starting to implement a tRPC API in #246. Feel free to review :)

I think it's a first good step to arrive to an offline-usable app :)

[RayBB]

I'll have to do a little research on tRPC and how the changes work but I certainly think it's a step in the right direction.
In the mean time if anyone else wants to work on this feel free to!