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/config.yml

@@ -0,0 +1,19 @@
+
+## .gitea/ISSUE_TEMPLATE/config.yml
+
+```yaml
+---
+blank_issues_enabled: false
+
+contact_links:
+  - name: Documentation
+    url: https://docs.automotive-rtos.com
+    about: Check the documentation first
+
+  - name: Discussion Forum
+    url: https://github.com/automotive-rtos/rtos/discussions
+    about: Ask questions in the discussion forum
+
+  - name: Security Issues
+    url: https://github.com/automotive-rtos/rtos/security
+    about: Report security vulnerabilities here