feat: add multi-model cleanup tool and CLI command

- Bump `@opencode-ai/plugin` dependency from 1.2.27 to 1.3.0.
- Introduce `cleanup` command in CLI with force and remote options.
- Export `cleanupMultiModel` from core index.
- Register `multi-model-cleanup` tool in plugin and update exports.
- Add `CleanupOptions` and `CleanupResult` types to define cleanup behavior and results.

src/index.ts

@@ -1,13 +1,15 @@
 import type { Plugin } from "@opencode-ai/plugin";
+import { cleanupTool } from "./tools/cleanup";
 import { closeTool } from "./tools/close";
 import { openTool } from "./tools/open";
 
 /**
  * OpenCode plugin that provides multi-model tmux session management tools.
  *
- * Registers two tools:
+ * Registers three tools:
  * - `multi-model-open`: Launch multiple AI models in a tmux session
  * - `multi-model-close`: Close a multi-model session and cleanup resources
+ * - `multi-model-cleanup`: Delete all archive tags from local and remote repositories
  *
  * @example
  * ```json
@@ -22,6 +24,7 @@ const OpenCodeMultiModelPlugin: Plugin = async (_ctx) => {
     tool: {
       "multi-model-open": openTool,
       "multi-model-close": closeTool,
+      "multi-model-cleanup": cleanupTool,
     },
   };
 };
@@ -29,4 +32,4 @@ const OpenCodeMultiModelPlugin: Plugin = async (_ctx) => {
 export default OpenCodeMultiModelPlugin;
 export * from "./core/index";
 export * from "./types";
-export { closeTool, openTool };
+export { cleanupTool, closeTool, openTool };