Create java-dependencies.md

[JordtenBulte]

I was working with mxcli on a test project and trying to push its boundaries. Found adding java dependencies is not (yet) supported in MDL. Therefore, I made claude write a skill to make it aware. Please review the skill thoroughly. It worked for me but I am not a good enough developer to be certain on this.

[ako]

Thanks for this @JordtenBulte — you identified a real gap and the workaround skill you wrote is accurate for the current state.

Good news: the feature is now implemented. The microflow branch adds full MDL support for managing Maven/JAR dependencies:

-- Add a dependency
ALTER MODULE MyModule
  ADD JAR DEPENDENCY (
    group    = 'org.duckdb',
    artifact = 'duckdb_jdbc',
    version  = '1.1.3',
    included = true,
  );

-- Update version
ALTER MODULE MyModule SET JAR DEPENDENCY 'org.duckdb:duckdb_jdbc' VERSION '1.2.0';

-- Toggle inclusion
ALTER MODULE MyModule SET JAR DEPENDENCY 'org.duckdb:duckdb_jdbc' INCLUDED false;

-- Add/drop transitive exclusion
ALTER MODULE MyModule SET JAR DEPENDENCY 'org.duckdb:duckdb_jdbc' ADD EXCLUSION 'com.example:lib';

-- Remove
ALTER MODULE MyModule DROP JAR DEPENDENCY 'org.duckdb:duckdb_jdbc';

-- List and describe
LIST JAR DEPENDENCIES IN MyModule;
DESCRIBE JAR DEPENDENCY MyModule 'org.duckdb:duckdb_jdbc';

The implementation includes:

• ANTLR grammar, AST, visitor, executor, and backend wiring
• BSON reader/writer for Projects$ModuleSettings / Projects$JarDependency
• Updated java-dependencies.md skill (covering the new MDL syntax, coordinate format, Jackson version gotcha, Gradle resolution note)
• Docs-site reference pages

The skill in this PR correctly documented what was true at the time, but it's been superseded. I'll close this PR since the feature and documentation are now covered in the implementation. Thanks again for the report — the BSON investigation you prompted helped define the storage format correctly!

[ako]

Closing — the feature is now implemented in MDL (see comment above). The skill has been updated with correct MDL syntax in the implementation branch.