chore(ci): add ClawHub publish workflow and script

- Add clawhub-publish.sh to publish all skills with version > 0.0.0
- Refactor workflow to use the shared script
- Add WIP skills with version 0.0.0 (skipped by publish)

clawhub-publish.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ -n "${CLAWHUB_TOKEN:-}" ]; then
+  npx -y clawhub login --token "$CLAWHUB_TOKEN"
+fi
+
+for skill_dir in skills/*/; do
+  skill_name=$(basename "$skill_dir")
+  skill_file="${skill_dir}SKILL.md"
+
+  if [ ! -f "$skill_file" ]; then
+    echo "Skipping ${skill_name}: no SKILL.md found"
+    continue
+  fi
+
+  # Parse version from frontmatter
+  version=$(awk '/^---$/{c++; next} c==1 && /^[[:space:]]*version:/{gsub(/[" ]/, "", $2); print $2; exit}' "$skill_file")
+
+  if [ -z "$version" ] || [ "$version" = "0.0.0" ]; then
+    echo "Skipping ${skill_name}: no version or version is 0.0.0"
+    continue
+  fi
+
+  echo "Publishing ${skill_name} v${version}"
+  npx -y clawhub publish "$PWD/${skill_dir}" --version "$version" || true
+done