feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- System prompt injection for routing
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

sdks/vscode/.vscode-test.mjs

@@ -0,0 +1,5 @@
+import { defineConfig } from "@vscode/test-cli"
+
+export default defineConfig({
+  files: "out/test/**/*.test.js",
+})