fix: Installs underneath a path containing leading underscores

[hirasso]

Fixes #7406

Makes it possible to run astro underneath a path that contains leading underscores, like e.g. /_my/path/to/site/.

Changes

• Make the glob patterns in the astroContentVirtualModPlugin relative to the content directory

Testing

I really don't know how I should test this using a written test. Tested it manually instead.

Still, out of curiosity I ran pnpm run test. There were a few tests that were failing for me, regardless of the proposed change from this PR.

Docs

This is a bugfix, no docs needed I guess

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[bluwy]

Thanks for fixing this! The test should work fine, but maybe you're seeing flaky tests locally. I'm fine with not having tests for this for now though since it relies on an underscore outside the project filesystem.

[bluwy]

Awesome