Add Grok orchestration group routing (#8058)

* docs: design Grok orchestration group

* docs: plan Grok orchestration group implementation

* fix: add Grok orchestration group

* test(orchestration): accept Windows skill newlines

* Fix @grok orchestration group matching and remove stale planning docs

- Reuse the shared buildAgentNameRe matcher in groups.ts instead of a
  divergent local regex, so orchestration groups honor the same
  Windows launcher-suffix rule (grok.exe/.cmd/.bat/.ps1) as the rest
  of Orca's agent-title detection.
- Add test coverage for real Grok OSC title shapes (spinner-collapsed,
  session titles) and Windows launcher-suffix titles.
- Delete the now-completed design and implementation-plan docs for
  the Grok orchestration group work.

---------

Co-authored-by: Jinjing <6427696+AmethystLiang@users.noreply.github.com>

src/main/ipc/bounded-warning-dedupe.test.ts

@@ -1,8 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import {
-  DEFAULT_WARNING_DEDUPE_MAX_KEYS,
-  shouldEmitBoundedWarning
-} from './bounded-warning-dedupe'
+import { DEFAULT_WARNING_DEDUPE_MAX_KEYS, shouldEmitBoundedWarning } from './bounded-warning-dedupe'
 
 describe('shouldEmitBoundedWarning', () => {
   it('keeps retained warning keys quiet without cascade eviction after saturation', () => {
@@ -29,8 +26,6 @@ describe('shouldEmitBoundedWarning', () => {
     )
 
     expect(keys.filter((key) => shouldEmitBoundedWarning(warningKeys, key))).toEqual(keys)
-    expect(keys.filter((key) => shouldEmitBoundedWarning(warningKeys, key))).toEqual([
-      keys.at(-1)
-    ])
+    expect(keys.filter((key) => shouldEmitBoundedWarning(warningKeys, key))).toEqual([keys.at(-1)])
   })
 })

src/main/ipc/repos-remote.test.ts

@@ -155,10 +155,7 @@ vi.mock('./ssh', () => ({
 }))
 
 import { registerRepoHandlers } from './repos'
-import {
-  clearSubmodulePathsCacheForTests,
-  listSubmodulePaths
-} from '../git/status'
+import { clearSubmodulePathsCacheForTests, listSubmodulePaths } from '../git/status'
 
 beforeEach(() => {
   clearGitCapabilityStateForTests()