Submit options (-r / revert-unchanged / -e shelved) + .p4ignore editor

- Pending changelist menu: Submit & keep checked out (-r), Submit reverting
  unchanged, Submit shelved (-e)
- Tools -> Edit .p4ignore: read/write workspace .p4ignore with an Unreal template
- Backend p4 submit -r/-f revertunchanged/-e, .p4ignore read/write

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/p4.ts

@@ -85,6 +85,10 @@ export const p4 = {
   commit: (description: string, files: string[]) =>
     invoke<string>("p4_commit", { description, files }),
   submitChange: (change: string) => invoke<string>("p4_submit_change", { change }),
+  submitShelved: (change: string) => invoke<string>("p4_submit_shelved", { change }),
+  submitOpts: (change: string, reopen: boolean, revertUnchanged: boolean) => invoke<string>("p4_submit_opts", { change, reopen, revertUnchanged }),
+  ignoreRead: () => invoke<string>("p4_ignore_read"),
+  ignoreWrite: (content: string) => invoke<void>("p4_ignore_write", { content }),
   reopenDefault: (files: string[]) => invoke<string>("p4_reopen_default", { files }),
   setDesc: (change: string, description: string) => invoke<string>("p4_set_desc", { change, description }),
   add: (files: string[]) => invoke<OpenedFile[]>("p4_add", { files }),