Overhaul buildscripts

[Timtaran]

• Updates gradle to 9.4.1 (preparation for the transition to stonecutter)
• Adds maven publishing to nightly and release actions

[Timtaran]

I can't say that I've managed to fit it into the current buildSrc as I wanted first, but it might be a suitable solution.

Nightly build publishing works fine, but I haven't tested release one.

Following github secrets should be set:
MAVEN_RELEASES_REPO - repo uri for releases
MAVEN_SNAPSHOTS_REPO - repo uri for nightly builds
MAVEN_USER
MAVEN_TOKEN

[xI-Mx-Ix]

Thanks for the PR! Could you revert the version bump? I want to wait until the actual release. Also, please keep the current Gradle version for now as I’d rather update it once we integrate Stonecutter.

[Timtaran]

Thanks for the PR! Could you revert the version bump? I want to wait until the actual release. Also, please keep the current Gradle version for now as I’d rather update it once we integrate Stonecutter.

I believe versions should be bumped after the past release because there is -SNAPSHOT (versions before release) and releases itself.
I also don't see problem with gradle update if everything work fine, but I will revert it in a couple minutes.

[Timtaran]

but yeah maybe it's better to bump it to x.y.z-SNAPSHOT instead of adding -SHAPSHOT inside nightly build