Add doxygen doc confg

[kimkulling]

• Add doxygen
• Fix doc strings

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e8642aee-8e38-487b-9e0e-aa6caae38bbf

📥 Commits

Reviewing files that changed from the base of the PR and between 2b427f2 and 2f64b84.

📒 Files selected for processing (4)

• docs/Doxyfile.in
• src/tinyui.h
• src/widgets.cpp
• src/widgets.h

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bugfix/fix_doxygen_docs

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud