feat(plugin): add v2 tui entrypoint

packages/plugin/src/v2/tui/context.ts

@@ -105,7 +105,7 @@ export interface UI {
 }
 
 export interface Context {
-  readonly options: Record<string, any>
+  readonly options: Readonly<Record<string, unknown>>
   readonly client: OpenCodeClient
   readonly data: Data
   readonly ui: UI

packages/plugin/src/v2/tui/index.ts

@@ -0,0 +1 @@
+export * as Plugin from "./plugin.js"

packages/plugin/src/v2/tui/plugin.ts

@@ -0,0 +1,14 @@
+import type { Context } from "./context.js"
+
+export type { Context }
+
+export type Cleanup = () => Promise<void> | void
+
+export interface Definition {
+  readonly id: string
+  readonly setup: (context: Context) => Promise<Cleanup | void> | Cleanup | void
+}
+
+export function define(plugin: Definition) {
+  return plugin
+}