fix: Correctly zip local (and aliased) packages

[darthmaim]

Overview

I've fixed handling of local (and aliased) packages when building the zip.

Before this fix it was not possible to include local dependencies in the sources zip, which for example can often happen in monorepos.

Testing

I've added a test case that tests the new behavior, and I've also tested this with a combination of scoped and unscoped packages.

Notes

• The should download local packages and produce a valid build when zipping sources test case is basically just a copy/paste of the existing should download packages and produce a valid build when zipping sources test, the only difference being the local dependencies. It might be nicer to just include the local dependencies in the original test case?
• I've created the local test module in e2e/tests/__fixtures__/local-package. I originally wanted to create it with project.addFile('local/package.json'), but pnpm.listDependencies could not parse the output with the nested dependencies. This could be fixed by removing the -r option, but it was explicitly added in fix(zip): List all private packages correctly in a PNPM workspace #520, so I opted to store the local package outside of the extension directory.
• downloadDependency needs to be able to resolve relative dependencies, so I've added a new cwd option similar to the one in listDependencies
• As my testcase uses the same dependency twice to test both file: (usual default for local dependencies) and link: (what pnpm resolves workspace: to), pnpm creates an alias for one of them. downloadPrivatePackages did not create valid overrides for aliased packages, so I had to fix this too.
• It might be nicer to use for example npm-package-arg for parsing the package ids than using regex. Edit: npm-package-arg doesn't support parsing aliases.

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[darthmaim]

I did some more tests today, and while this does fix the handling of link: and file: dependencies, it does not yet fully fix my initial issue with "downloading" workspace:* dependencies.

The generated package.json will look like this:

  "dependencies": {
    "@local/dependency": "workspace:*",
  },
  "resolutions": {
    "@local/dependency@link:../../packages/dependency": "file://./.wxt/local_modules/local-dependency-0.0.1.tgz"
  }

Trying to install this with npm will result in Unsupported URL Type "workspace:".

I'll look into adding special handling for workspace: dependencies in the next few days, maybe in a follow up PR.

Maybe downloaded workspace: dependencies should just be directly rewritten directly without using resolutions:

  "dependencies": {
    "@local/dependency": "file://./.wxt/local_modules/local-dependency-0.0.1.tgz",
  }