* feat: migrate to ESM and update dependencies
- Migrated the project to ESM to support the latest `@actions/*` package versions.
- Updated dependencies to their latest versions, including `@actions/core`, `@actions/github`, and others.
- Replaced `.prettierrc.js` with `.prettierrc.json` for configuration.
- Updated ESLint configuration to use ESM and added new rules.
- Refactored test files to use `jest` with ESM imports.
- Removed deprecated files and updated import paths to use `.js` extensions.
- Added new files for improved configuration and removed unnecessary mocks.
- Updated README to reflect breaking changes in version 7.
* docs: update README to clarify ESM migration details and adjust TypeScript configuration
* push to excess labels to avoid reaching the limit
* build dist
* never set more than 100 labels
* use splice instead of set
* ignore IDE folders
* install @octokit/plugin-retry
* always setLabels
* fix indentations
* fix specs
* add spec for excess labels
* prettier
* licensed cache
* revert to !!core.getInput('sync-labels')
* better warning for exceeded labels
* keep manually-added labels
* nest the dedupe logic
* rename `removeLabel` to `removeLabelFromList` to avoid confusion
* use Sets, and issue a call only if labels have actually changed
* remove IDE config folders from gitignore
* remove obsolete duplucation check
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Co-authored-by: Mark Massoud <mark@unrealcloud.io>