Implement automatic release action

[rihi]

Pull request to add github action to automatically publish new releases.

Automatically creates a new commit which updates plugin.json with the new plugin version. Tags and plublishes commit.

New version is generated by time.strftime("%Y-%m-%d").
Releases are titled Release <version>.
Body of release contains Automatic release.

Fixes #384. (Though we should probably consider updating minimumbinaryninjaversion in plugin.json)

[steffenenders]

Thank you! I just tested this on a fork of dewolf and it seems to work as intended.

[rihi]

Seems like the automatic release doesn't work for this repository, because main is configured as a protected branch, which can't be directly pushed to. Not sure how we want to handle this...