[Oomph-Setup] Add eclipse.platform.ui configuration setup

[HannesWell]

Additionally add a styled and drag&drop-able Oomph Configuration button.

Part of eclipse-platform/eclipse.platform.releng.aggregator#2430

[github-actions]

Test Results

0 files   -  1 815  0 suites   - 1 815   0s ⏱️ - 1h 44m 7s
0 tests  -  7 704  0 ✅  -  7 476  0 💤  - 228  0 ❌ ±0 
0 runs   - 24 273  0 ✅  - 23 526  0 💤  - 747  0 ❌ ±0 

Results for commit f3809dd. ± Comparison against base commit 7b0f776.

♻️ This comment has been updated with latest results.

[merks]

A configuration reference is needed:

Drag and drop the configuration resource onto the editor of the project setup, and alt-drag the Configuration instance and drop it onto the Configuration annotation. (Ask me on slack if you need help.)

[HannesWell]

A configuration reference is needed:

Drag and drop the configuration resource onto the editor of the project setup, and alt-drag the Configuration instance and drop it onto the Configuration annotation. (Ask me on slack if you need help.)

Thanks for the hint! Just added it.

Since the verification build does not test this, I'll submit this to see if the Oomph badge is generated as expected by https://ci.eclipse.org/oomph/job/setup-archiver/.

[HannesWell]

Since the verification build does not test this, I'll submit this to see if the Oomph badge is generated as expected by https://ci.eclipse.org/oomph/job/setup-archiver/.

Worked as expected:

And the displayed content also looks good:
https://www.eclipse.org/setups/installer/?url=https://raw.githubusercontent.com/eclipse-platform/eclipse.platform.ui/master/releng/org.eclipse.ui.releng/platformUIConfiguration.setup&show=true

[merks]

You must have done something right. 🤪