Generate p2 repo with Maven

[AObuchow]

It’d be a lot nicer to generate the p2 repo with maven, as is done for Wild Web Developer. This would allow automatic deployment of the newest version of the plugin through GitHub Actions

[PyvesB]

Just as a heads up, I implemented a similar GitHub action for my Ruby plugin here: https://github.com/PyvesB/eclipse-solargraph

However, something recently changed with GitHub actions as the last two runs failed. Surprisingly, something seemed wrong with the cp command, but I haven't really had time to investigate further.

[AObuchow]

Awesome, thank you!

That's really helpful, I'll be basing my deployment action on the one you set up (and hopefully figure out what's going wrong with the cp command ;) )

[AObuchow]

Fixed in #18, will make a separate issue to use GitHub actions.