Rework: Bug report issue templates

.gitlab/issue_templates/Bug Report.md

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+## Bug Report
+<!-- The reccommended type is: Issue -->
+
+### Environment
+- **Branch & Commit:**
+- **Operating system:**
+- **How was execution started (Gradle task / IDE debug / IDE run):**
+- **Java version:** `25`
+- **Gradle version**: `9.3.1`
+
+### Summary
+<!-- Short, precise description of the bug -->
+
+### Expected Behavior
+<!-- What you expected to happen -->
+
+### Actual Behavior
+<!-- What actually happened instead -->
+
+### Steps to Reproduce
+<!--
+1. Do this first
+2. Then do that next
+3. Lastly, see the unexprected ...
+-->
+
+### Stack Trace / Error Message
+```
+<!-- Paste stack trace or log output here -->
+```
+
+### Possible Cause / Notes
+<!-- Optional: your own hypothesis about the root cause -->
+
+### Checklist
+- [ ] I reproduced the problem using the steps above
+- [ ] I searched documentation docs for relevant information
+- [ ] I added relevant labels
+
+/label ~bug