feat: support subpaths of supported dependencies (e.g. `node:fs/promises`) [sc-22943]

[sorccu]

This PR makes it possible (or rather, allowed) to import subpaths from a supported dependency, such as node:fs/promises even though we only list node:fs as a supported module. It also supports cases where a dependency uses exports in package.json to expose subpaths of the module, and legacy usage where you don't specify any exports but access subpaths anyway. One very basic example being checkly/constructs. Note that these subpaths are not currently allowed by the runner due to its very basic allow-list implementation.

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Affected Components

• [x] CLI
• [ ] Create CLI
• [ ] Test
• [ ] Docs
• [ ] Examples
• [ ] Other

Notes for the Reviewer

Resolves #[issue-number]

New Dependency Submission