Add tea_issue_create tool for creating GitHub issues

.opencode/tools/tea-issue-create.ts

@@ -0,0 +1,20 @@
+import { tool } from "@opencode-ai/plugin"
+import { exec } from "child_process"
+import { promisify } from "util"
+
+const execAsync = promisify(exec)
+
+export default tool({
+  description: "Create a new issue in the GitHub repository using tea CLI",
+  args: {
+    title: tool.schema.string().describe("Issue title"),
+    description: tool.schema.string().optional().describe("Issue description (supports markdown)"),
+    labels: tool.schema.string().optional().describe("Comma-separated list of labels"),
+    milestone: tool.schema.string().optional().describe("Milestone name"),
+  },
+  async execute(args) {
+    const cmd = `tea issues create -t "${args.title}"`
+    const { stdout, stderr } = await execAsync(cmd)
+    return stdout.trim()
+  },
+})