This patch introduces `npm_i` command to install locally-built versions of
Playwright packages instead of fetching them from the registry.
With this patch:
```bash
npm i ${PLAYWRIGHT_CORE_TGZ}` # never needed anymore
npm_i playwright-core # the right way to install local package
```
Note that you can pass any NPM arguments to `npm_i` and cannot use it to install non-playwright packages.
