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/

packages/storybook/.storybook/manager.ts

@@ -0,0 +1,11 @@
+import { addons, types } from "storybook/manager-api"
+import { ThemeTool } from "./theme-tool"
+
+addons.register("opencode/theme-toggle", () => {
+  addons.add("opencode/theme-toggle/tool", {
+    type: types.TOOL,
+    title: "Theme",
+    match: ({ viewMode }) => viewMode === "story" || viewMode === "docs",
+    render: ThemeTool,
+  })
+})