Initial commit: AirCoding V1.0.0 Alpha architecture baseline

Complete architecture document set with multi-model review remediation:
- Frozen interface contracts, runtime semantics, DB schemas
- Event/tool/error/provider registries
- Scheduler and main agent state machines
- C4 module/code views, solution architecture, baseline V1
- Multi-model review reports and joint assessment
- Phase-gate remediation complete (P0/P1/P2/UX resolved)
- Implementation plan with T-000A through T-045
- Reference folders kept as placeholders only

reference/opencode-1.15.5/.github/ISSUE_TEMPLATE/question.yml

@@ -0,0 +1,10 @@
+name: Question
+description: Ask a question
+body:
+  - type: textarea
+    id: question
+    attributes:
+      label: Question
+      description: What's your question?
+    validations:
+      required: true