Add TypeScript Agent SDK reference documentation

- Introduced comprehensive API reference for the TypeScript Agent SDK.
- Documented installation instructions for the SDK.
- Detailed the main functions: `query()`, `tool()`, and `createSdkMcpServer()`.
- Defined various types including `Options`, `Query`, `AgentDefinition`, and more.
- Included message types and their structures, such as `SDKMessage`, `SDKAssistantMessage`, and `SDKUserMessage`.
- Explained hook types and their usage within the SDK.
- Provided detailed documentation for tool input and output types.
- Added sections on permission types and other relevant types for better clarity.

src/hooks/summary-hook.ts

@@ -68,6 +68,12 @@ async function summaryHook(input?: StopInput): Promise<void> {
     }
     // Re-throw HTTP errors and other errors as-is
     throw error;
+  } finally {
+    await fetch(`http://127.0.0.1:${port}/api/processing`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ isProcessing: false })
+    });
   }
 
   console.log(createHookResponse('Stop', true));