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/mocks/app/hooks/use-providers.ts

@@ -0,0 +1,23 @@
+const model_id = "claude-3-7-sonnet"
+
+const provider = {
+  id: "anthropic",
+  models: {
+    [model_id]: {
+      id: model_id,
+      name: "Claude 3.7 Sonnet",
+      cost: { input: 1, output: 1 },
+      variants: { fast: {}, thinking: {} },
+    },
+  },
+}
+
+export function useProviders() {
+  return {
+    all: () => [provider],
+    default: () => ({ anthropic: model_id }),
+    connected: () => [provider],
+    paid: () => [provider],
+    popular: () => [provider],
+  }
+}