Minimal1 (#12)

* ci: Fix PlantUML integration in CI documentation build

- Add Java installation via actions/setup-java@v3
- Install PlantUML on each platform (Linux, macOS, Windows)
- Replace docs-html with docs-with-diagrams to ensure diagrams are included
- Add platform-specific PlantUML installation steps
- Update workflow to correctly generate UML diagrams in documentation

Author: avrabe

.github/workflows/publish.yml

@@ -55,7 +55,7 @@ jobs:
         run: cargo install just --locked
 
       - name: Build Sphinx documentation
-        run: just docs-html
+        run: just docs-with-diagrams
 
       - name: Setup Rust and build API docs
         uses: actions-rs/toolchain@v1