feat: add initial implementation of Opencode client and session handling

- Created agent.ts to export necessary components from the plugin source.
- Implemented index.ts to initialize Opencode client and list projects and sessions.
- Added functionality to prompt a session with specific tool instructions.

src/index.ts

@@ -0,0 +1,49 @@
+import { createOpencode, createOpencodeClient } from '@opencode-ai/sdk'
+import util from 'node:util'
+const showMore = (obj: any) => {
+  return util.inspect(obj, { showHidden: false, depth: null, colors: true })
+}
+
+// const client = await createOpencode({
+// })
+const client = await createOpencodeClient({
+  baseUrl: "http://localhost:4096",
+})
+// const sessions = await client.session.list()
+
+// console.log('session', sessions)
+
+// const sessions = await client.session.list({
+//   query: {
+//     directory: '/home/ubuntu/kevisual'
+//   }
+// })
+
+// console.log('session', sessions)
+
+const project = await client.project.list()
+console.log('project', project)
+const first = project.data?.[0]
+if (first) {
+  const sessions = await client.session.list()
+  console.log('session', sessions)
+  const session = sessions.data?.[0]
+  if (session) {
+    const id = session.id;
+    const res = await client.session.prompt({
+      path: { id: session.id },
+      body: {
+        // noReply: true,
+        tools: {
+          greet: false,
+        },
+        // parts: [{ type: "text", text: "执行Greet工具" }],
+        // parts: [{ type: "text", text: "name是 xiong" }],
+        parts: [
+          { type: "text", text: "执行Greet工具" },
+          { type: "text", text: "name是 xiong" }],
+      },
+    })
+    console.log('res', showMore(res))
+  }
+}