chore: improve pnpm usage

[SuperchupuDev]

Summary

• Removes pnpm lockfiles from some package directories. In pnpm monorepos there should only be the root one
• Bumps all js dependencies (including major updates, hopefully nothing breaks)
• Sorts .gitattributes
• Adds shared to pnpm-workspace.yaml
• Adds the packageManager field for corepack users. For more info see https://nodejs.org/api/corepack.html. It makes the pnpm workflow use that field. Also removes engines.pnpm
• Minor package.json improvements

For maintainers:

• Consider using pnpm via corepack, that way every single maintainer can stay in sync with the same pnpm version specified in the packageManager field
• Bumping deps should be done at the root directory with the -r (recursive) flag to avoid future monorepo problems

Test Plan

CI should pass

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[Conaclos]

Do you think it could be worth adding some instructions in our CONTRIBUTING guide?

[SuperchupuDev]

Sounds good, will do

[ematipico]

Thank you!

[SuperchupuDev]

i think my last commit fixes netlify not using cache

previous discussion:

[SuperchupuDev]

ci is throwing errors about no space left on device on the rust setup actions. my last few commits don't add anything that could cause that problem

[ematipico]

ci is throwing errors about no space left on device on the rust setup actions. my last few commits don't add anything that could cause that problem

Yeah it's unrelated to your changes, feel free to merge your PR