feat(git-hangman-lab): add create-pr command

- Add create-pr script for creating pull requests via API
- Auto-generate access token if not present
- Integrate into git-ctrl dispatcher
- Update SKILL.md with new command documentation

git-hangman-lab/scripts/git-ctrl

@@ -11,6 +11,7 @@ if [[ $# -eq 0 ]]; then
   echo "  check-git-cred              Verify git credentials"
   echo "  create-git-account          Create a new git account"
   echo "  create-repo                 Create a new repository"
+  echo "  create-pr                   Create a pull request"
   echo "  generate-access-token       Generate access token for current user"
   echo "  link-keycloak               Link Keycloak account with Gitea"
   echo "  repo-add-collaborators      Add collaborator to repository"
@@ -35,6 +36,9 @@ case "$subcommand" in
   create-repo)
     "$SCRIPT_DIR/create-repo" "$@"
     ;;
+  create-pr)
+    "$SCRIPT_DIR/create-pr" "$@"
+    ;;
   generate-access-token)
     "$SCRIPT_DIR/generate-access-token" "$@"
     ;;