feat: adds support for workspace protocol

[EdRW]

Currently, dependencies that live in another package within a monorepo workspace get treated as external, which causes a error.

This change adds support for monorepos using the workspace: protocol by treating workspace packages as notExternal.

This is done by checking the package.json for dependencies that are referenced using workspace: protocol e.g. "foo": "workspace:*", and adding them to the notExternal array that is passed to the externalPlugin.

• resolves #40

Info about workspaces

• https://pnpm.io/workspaces
• https://yarnpkg.com/features/workspaces

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[EdRW]

Just wanted to add that this change doesn't add support for NPM workspaces, since NPM doesn't use the workspace: protocol.

Unfortunately this change won't resolve this issue.

• eslint/config-inspector#95

Info about NPM workspaces

• https://docs.npmjs.com/cli/v11/configuring-npm/package-json#workspaces