feat: add ability to restore cache by exact match

[szymonmaszke]

Closes #57 #43

Overview

• Added new input for the action cache-restore-exact-match (default: 'false') - if 'true', will restore cache ONLY when the primary-key matches
• Added relevant logic changes to .js files and regenerated dist.js via pnpm run build

Now it should be possible to create workflows as outlined in #57 and #43:

• Create multiple caches (with a subset of dependencies) in the main branch (via GH Actions matrix strategy or similar)
• Reuse this cache in PRs

Previously secondary restore-key would match even if the hashed dependency paths did not match.

Tests

• No new tests implemented (default behavior should not change)
• New tests might be necessary due to different cache restoration if cache-restore-exact-match: true, though I am not sure what the maintainers approach would be

Let me know if you would like any additional changes (keep in mind I'm not JS dev though)

EDIT: FWIW tested cache-restore-exact-match: true in one of my private repos and works as intended