Extension methods for getting current commit hash and timestamp

[lukebemish]

See https://discord.com/channels/313125603924639766/1136320550168436798/1161044932186865684. Several NeoForged projects, including Access transformers, include the build time as a timestamp in the built manifest. This isn't great. A better solution would be to include the timestamp and hash of the current commit - and having a method in the gradleutils extension for that is probably a good idea

[PaintNinja]

Helpful resource for writing extension methods with good IDE support: https://blog.mrhaki.com/2013/01/groovy-goodness-adding-extra-methods.html
A bit dated as you need to put it in META-INF\groovy instead of META-INF\services now but otherwise good.

[lukebemish]

Helpful resource for writing extension methods with good IDE support: https://blog.mrhaki.com/2013/01/groovy-goodness-adding-extra-methods.html
A bit dated as you need to put it in META-INF\groovy instead of META-INF\services now but otherwise good.

Pretty sure groovy extension methods don't work with gradle, and certainly aren't usable by any of the other JVM languages that interact with gradle stuff. With that said - there's already a gradleutils project extension with lots of other stuff like thid, so I'd add it to that