feat(wave3): add @mosaic/coord — TypeScript orchestrator package

- Mission CRUD: createMission, loadMission
- TASKS.md parser/writer: parseTasksFile, writeTasksFile, updateTaskStatus
- Task runner: runTask, resumeTask (spawns agent via child_process)
- Status aggregation: getMissionStatus, getTaskStatus
- CLI: coord init | run | resume | status
- Depends on @mosaic/types and @mosaic/queue workspace:*

packages/coord/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "@mosaic/coord",
+  "version": "0.1.0",
+  "type": "module",
+  "description": "Mosaic mission coordination — TypeScript rewrite of mosaic coord",
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "typecheck": "tsc --noEmit",
+    "lint": "echo 'ok'",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@mosaic/queue": "workspace:*",
+    "@mosaic/types": "workspace:*",
+    "commander": "^13",
+    "js-yaml": "^4"
+  },
+  "devDependencies": {
+    "@types/js-yaml": "^4",
+    "@types/node": "^22",
+    "typescript": "^5",
+    "vitest": "^2"
+  }
+}