chore: update to RXJS 7 [WIP]

[valpinkman]

📝 Description

To match with wallet-api using RXJS, we bumped it's version to 7

I used some documentation to help me out

• https://rxjs.dev/deprecations/breaking-changes#breaking-changes-in-version-7
• https://rxjs.dev/deprecations/to-promise#conversion-to-promises
• https://rxjs.dev/api/index/function/timeout#timeout

I've only fixed the broken toPromise using lastValueFrom as the api changed for toPromise (can now return undefined), but the api is deprecated and we should replace them.

Studies

Things to note:

• drop rxjs-compat and make sure it works with v6
• fix breaking changes from v5 to v6
• update to v7

Things to watch out for:

• toPromise() signature change (can now return underfined)
  • will be deprecated in future version => lastValueFrom and firstValueFrom
• throwError signature change

❓ Context

• Impacted projects: libs, lld, llm, cli
• Linked resource(s): ``

✅ Checklist

• Test coverage
• Atomic delivery
• [] No breaking changes this is to be tested still

📸 Demo

🚀 Expectations to reach

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