v0.6.0: ESM port + bump dotenvx to 1.71.3

Community contributions: - @sebdanielsson's Action runtime upgrade to Node.js 24: https://github.com/andreijiroh-dev/dotenvx-action/pull/9 (with help from CodeRabbit) What's else in this release: - Officially ported the action codebase to ES Modules as part of upgrading @actions/core to v3.x (among other packages behind the scenes) - Implement some code quality and TypeScript diagnositics related fixes with assistance from GitHub Copilot and Zed Agent -----BEGIN SSH SIGNATURE----- U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgRe4PeEnAieVwezfCRdYBY2jx6z ds8B3Z7yKmPKqAanYAAAADZ2l0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5 AAAAQG2A1hbmdn8GoMhdEXtp/Z4te+t3CgFVnOZJYAB0jZV5MCJbDm0Mj06o+k+SIx/Vv3 zBCgQKMyLrbA/5gElofAs= -----END SSH SIGNATURE-----

Release v0.3.0

Changelog: * Bump @dotenvx/dotenvx to v1.6.4 Commits diff in dotenvx: https://github.com/dotenvx/dotenvx/compare/v1.5.0...v1.6.4