feat: delete sessions (#362)

Co-authored-by: adamdottv <2363879+adamdottv@users.noreply.github.com>

packages/opencode/src/storage/storage.ts

@@ -29,6 +29,11 @@ export namespace Storage {
     await fs.unlink(target).catch(() => {})
   }
 
+  export async function removeDir(key: string) {
+    const target = path.join(state().dir, key)
+    await fs.rm(target, { recursive: true, force: true }).catch(() => {})
+  }
+
   export async function readJSON<T>(key: string) {
     return Bun.file(path.join(state().dir, key + ".json")).json() as Promise<T>
   }