feat: add session management CLI commands with @xmorse/cac

- Replace cac with @xmorse/cac for space-separated commands
- Add 'playwriter session new' to get new session ID
- Add 'playwriter session list' to show sessions and state keys
- Add 'playwriter session reset <id>' to reset a session
- Update SKILL.md with new CLI docs and multiline examples
- Put -s flag before -e in all examples

playwriter/package.json

@@ -10,6 +10,7 @@
     "build": "rm -rf dist *.tsbuildinfo && mkdir dist && bun scripts/build-selector-generator.ts && bun scripts/build-bippy.ts && tsc && bun scripts/build-resources.ts",
     "prepublishOnly": "pnpm build",
     "watch": "tsc -w",
+    "cli": "vite-node src/cli.ts",
     "typecheck": "tsc --noEmit",
     "mcp": "vite-node src/mcp.ts",
     "test": "vitest run -u",
@@ -43,7 +44,7 @@
     "@hono/node-server": "^1.19.6",
     "@hono/node-ws": "^1.2.0",
     "@modelcontextprotocol/sdk": "^1.25.2",
-    "cac": "^6.7.14",
+    "@xmorse/cac": "^6.0.7",
     "diff": "^8.0.2",
     "hono": "^4.10.6",
     "kill-port-process": "^3.2.1",