Add prePublish and postPublish hooks

[tanishqkancharla]

Pre-flight checklist

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project uses.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem description

Electron Forge doesn't have publish hooks e.g. prePublish and postPublish. I want these hooks so I can do a version check: I want to ensure in CI that the published version has been updated so that auto-updates work properly for users -- if the published app overwrites the previous version, the app won't auto-update.

Proposed solution

Introduce prePublish and postPublish hooks.

Alternatives considered

I can build around it in CI by just running the version verification command before I publish, but it'd be nice to define all the needed configuration in forge.config.ts, especially because the verification needs assets generated during the generateAssets hook.

Additional information

No response