Enable importing mc data files

[Machine-Maker]

Includes a demo change, changing the chat format. This should work with all run configs, like runDev, runShadow, runReobf as well as correctly build jars for production.

Tests will fail until an updated paperweight is released and can be used.

Requires https://github.com/PaperMC/paperweight/pull/190

Will be merged into initial patch once ready.

- [ ] https://github.com/PaperMC/paperweight/pull/190
- [ ] Remove demo change
- [x] merge into initial build system changes patch
- [ ] https://github.com/PaperMC/paperweight/pull/198
- [ ] paperweight release & update paperweight in build.gradle.kts