…0.1 (#766)

* chore(deps): bump @actions/core from 1.11.1 to 3.0.1

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.11.1 to 3.0.1.
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/core/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/core)

---
updated-dependencies:
- dependency-name: "@actions/core"
  dependency-version: 3.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* chore: initial plan for ESM conversion to support @actions/core v3

* feat: convert project to ESM to support @actions/core v3

- Change package.json type from commonjs to module
- Convert all source files (src/*.js) to ESM syntax
- Rename eslint.config.js to eslint.config.cjs (must stay CJS)
- Update action.yml to use await import() instead of require()
- Replace proxyquire with esmock in all test files
- Upgrade @vercel/ncc to 0.44.0 (supports ESM bundles)
- Add esmock dev dependency, remove proxyquire
- Rebuild dist/ with ncc 0.44.0 ESM output

All 68 tests pass with 100% coverage.

* chore: merge origin/main, convert mergeWindow to ESM, fix style

* fix: add missing newline at end of src/mergeWindow.js

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

* chore(deps): bump actions/github-script from 8.0.0 to 9.0.0

Bumps [actions/github-script](https://github.com/actions/github-script) from 8.0.0 to 9.0.0.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@ed59741...3a2844b)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-version: 9.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* chore: complete dependency bump validation

* chore: drop unintended lockfile change

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Co-authored-by: simoneb <actions@users.noreply.github.com>