Switch to pnpm (for local dev)

[jits]

Closes #73

I've verified that:

• Running pnpm start works locally
• Running pnpm build:all works locally
• CI passes (using pnpm exclusively)
• Caching works as expected in subsequent CI builds

Note: running pnpm verify:all causes some lint errors and a test error due to no test suite(s).

---

TODO:

• Ensure CI passes
• Update README(s?) to mention pnpm is used for local development

[jits]

@rainerhahnekamp — for the README update (to mention pnpm is used for local development), I'm thinking of quickly mentioning it under the "I have an idea for a new extension, can I contribute?" FAQ entry. Does that work for you, for now? In the long run it may be worth having a dedicated CONTRIBUTING doc.

[rainerhahnekamp]

Thanks, and about the README, yeah sure, why not?

[jits]

@rainerhahnekamp — ready for your review (when you have a sec) :)

[rainerhahnekamp]

Left a comment about the removal of nx

[rainerhahnekamp]

Sorry, I will never understand this. I selected "rebase and merge" and GitHub states me as the committer. If you want I can rebase main to the former, you can create the same PR again, and I try a simple merge.

[jits]

@rainerhahnekamp — that's not a problem at all — it shows as "jits authored and rainerhahnekamp committed" :)

[rainerhahnekamp]

Alright, then thanks a lot again.