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
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/ui/src/components/favicon.tsx

@@ -0,0 +1,13 @@
+import { Link, Meta } from "@solidjs/meta"
+
+export const Favicon = () => {
+  return (
+    <>
+      <Link rel="icon" type="image/png" href="/favicon-96x96-v3.png" sizes="96x96" />
+      <Link rel="shortcut icon" href="/favicon-v3.ico" />
+      <Link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon-v3.png" />
+      <Link rel="manifest" href="/site.webmanifest" />
+      <Meta name="apple-mobile-web-app-title" content="OpenCode" />
+    </>
+  )
+}