Add Agent Computer provider

Add an Agent Computer provider to the TypeScript SDK, wire in provider-specific inspector URLs, and document the new deploy flow with an example package.

Co-authored-by: Codex <noreply@openai.com>

examples/agentcomputer/tests/agentcomputer.test.ts

@@ -0,0 +1,27 @@
+import { describe, it, expect } from "vitest";
+import { SandboxAgent } from "sandbox-agent";
+import { agentcomputer } from "sandbox-agent/agentcomputer";
+
+const shouldRun = Boolean(process.env.COMPUTER_API_KEY || process.env.AGENTCOMPUTER_API_KEY);
+const timeoutMs = Number.parseInt(process.env.SANDBOX_TEST_TIMEOUT_MS || "", 10) || 300_000;
+
+const testFn = shouldRun ? it : it.skip;
+
+describe("agentcomputer provider", () => {
+  testFn(
+    "starts sandbox-agent and responds to /v1/health",
+    async () => {
+      const sdk = await SandboxAgent.start({
+        sandbox: agentcomputer(),
+      });
+
+      try {
+        const health = await sdk.getHealth();
+        expect(health.status).toBe("ok");
+      } finally {
+        await sdk.destroySandbox();
+      }
+    },
+    timeoutMs,
+  );
+});