fix: scope local warning to openclaw-only + improve spawn skill docs (#3074)

- Revert local security warning to openclaw-only (was blocking all agents)
- Update spawn skill to document how to run prompts on child VMs:
  - Always use `bash -lc` (binaries in ~/.local/bin/ need login shell)
  - Claude uses `-p` not `--print` or `--headless`
  - Add `--dangerously-skip-permissions` for unattended child VMs
  - Don't waste tokens with `which`/`find` or creating non-root users
- Sync all on-disk skill files with embedded version

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@openrouter/spawn",
-  "version": "0.27.5",
+  "version": "0.27.6",
   "type": "module",
   "bin": {
     "spawn": "cli.js"