Add full automotive RTOS project

Add kernel (Cortex-M0/M3/M4, Tricore, S32K, RISC-V ports), drivers,
middleware (CAN stack, diagnostics, safety), applications, board
support, build/test tooling, and documentation.

.gitea/ISSUE_TEMPLATE/custom_issue.md

@@ -0,0 +1,49 @@
+---
+name: Custom Issue
+about: Create a custom issue
+title: ''
+labels: ''
+assignees: ''
+---
+
+## Description
+
+<!-- Describe the issue -->
+
+## Type
+
+<!-- What type of issue is this? -->
+
+- [ ] Bug
+- [ ] Feature Request
+- [ ] Documentation
+- [ ] Performance
+- [ ] Security
+- [ ] Other
+
+## Priority
+
+<!-- What is the priority? -->
+
+- [ ] Critical
+- [ ] High
+- [ ] Medium
+- [ ] Low
+
+## Details
+
+<!-- Additional details about the issue -->
+
+## Related Issues
+
+<!-- Link to related issues -->
+
+- #123
+- #456
+
+## Labels
+
+<!-- Suggested labels -->
+
+-
+-