v2 message format and upgrade to ai sdk v5 (#743)

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Liang-Shih Lin <liangshihlin@proton.me>
Co-authored-by: Dominik Engelhardt <dominikengelhardt@ymail.com>
Co-authored-by: Jay V <air@live.ca>
Co-authored-by: adamdottv <2363879+adamdottv@users.noreply.github.com>

packages/opencode/src/snapshot/index.ts

@@ -55,9 +55,7 @@ export namespace Snapshot {
     log.info("restore", { commit })
     const app = App.info()
     const git = gitdir(sessionID)
-    await $`git --git-dir=${git} checkout ${commit} --force`
-      .quiet()
-      .cwd(app.path.root)
+    await $`git --git-dir=${git} checkout ${commit} --force`.quiet().cwd(app.path.root)
   }
 
   function gitdir(sessionID: string) {