This adds SPDX license headers to all source code files, following the
REUSE[1] specification. This does not include any asset files (such as
generated JSON files, or textures). While REUSE does support doing so
with ".license" files, for now we define these licences using the
.reuse/dep5 file.
[1]: https://reuse.software/
This fixes several issues I had with consuming multi-loader CC:T in
various upstream mods.
- Include /all/ sources in the Forge/Fabric jar. Before it was just the
common classes, and not the core or API.
- Use some Gradle magic to remove superfluous dependencies from the POM
file. Also make sure Cobalt and Netty are present as dependencies.
- Start using minimize() in our shadow jar config again.
