feat(cli): Add --skip-native-installation option to by pass installing packages in native venv

[ryanking13]

This adds a new --skip-native-installation flag to pywrangler sync.

When this flag is enabled, pywrangler will install packages only to the Pyodide venv, not in native venv. This is useful in two scenarios.

1. When there is no pre-compiled wheel for the native environment. (e.g. psycopg-c)

2. In CI, when users don't need auto completion, type hints etc.

[ask-bonk]

The documented --allow-local option does not exist; the CLI exposes --allow-build.

Suggested change

	However, when you are testing your local package that does not include
	any native extensions, you can use the `--allow-local` flag to allow installing
	it from source distribution.
	```
	uv run pywrangler sync --allow-local
	```
	However, when you are testing a local package that does not include any native
	extensions, you can use the `--allow-build` flag to allow installing it from a
	source distribution.
	```bash
	uv run pywrangler sync --allow-build

[ask-bonk]

The prose names a flag that Click does not register, so this direct instruction fails.

Suggested change

	In such cases, you can pass the `--skip-native` flag to skip the native installation, and only install the package for the Worker runtime.
	In such cases, you can pass the `--skip-native-installation` flag to skip the native installation, and only install the package for the Worker runtime.

[ask-bonk]

I'm Bonk, and I've done a quick review of your PR.

Adds an option to skip native virtual-environment package installation during sync.

1. Low: README.md documents a nonexistent --allow-local option. Inline suggestion posted.
2. Low: README.md refers to a nonexistent --skip-native option. Inline suggestion posted.

github run

[dom96]

Seems fine, though I wonder if having these two separate modes is the best way to solve this. The problem to me seems that your project would only have 1 or 2 such packages, so disabling native installation for the full project would affect your other packages too. Could we get pywrangler to intelligently know that a package cannot be installed natively and so skip the installation for only that package?

[ryanking13]

Could we get pywrangler to intelligently know that a package cannot be installed natively and so skip the installation for only that package?

I think that is possible.

---

But actually, it turned out that pyscopg does not need this patch (I was building the wrong package), so let me mark this as draft until we find out the actual use case of this flag.