[continuous-deploy-fingerprint] Clean up code slightly

[wschurman]

Additional context

• Some clean up within the continuous-deploy-fingerprint action.
• Move tests into a directory that is covered by tsc
• Change tsc to not emit (we use bun for build)
• Change tsc to strict.

[wschurman]

• #313 👈
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

Join @wschurman and the rest of your teammates on Graphite