Add SRG obfuscation option

[ThexXTURBOXx]

This PR changes the following:

• Adds an option for SRG obfuscation (very useful if 1.5.2 mods should also support 1.5 and 1.5.1 - however this would also need to be implemented as a separate namespace in the 1.5.2 mappings)
• Fixes FlatLaf through disabling minimisation
• Updates the German translations
• Migrates to toml-based library and plugin declarations

[PhoenixVX]

1. LGTM though is this really necessary?
2. What is wrong with minimization? It works in my testing.
3. LGTM
4. LGTM

Will need to downgrade Shadow as it needs Java 11+ on the latest versions (which is why the build failed).

[ThexXTURBOXx]

1. Necessary? Probably no. But it's a feature that the original MCP also had and I am always using to build Block Helper - it does not have any downsides, just advantages.
2. When running in my IDE, it works fine. However, when running the built GUI, it complains about missing classes. It does also not save too much space (only like 33% - is it worth it?)

Will downgrade shadow plugin again - simply forgot about this change!

[ThexXTURBOXx]

Resolved the discussions - I left the comment after the minimize(), since it 100% does not work on my machine.
If it works on yours, feel free to remove it or tell me again and I will remove it :)

There are many, many, many errors here, btw. This is just the first snippet: