Add hotels-template-library (#2793)
Add hotels-template-library (#2793)

Associated infra change compiler-explorer/infra#558

The different sub-libraries under hotels-template-library are still under active development and don't have any version tags, so just trunk is necessary.
mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer