deprecate: move treeland-dde-shell-v1 to deprecated/ - #113

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions-ecosystem/action-regex-match@v2, linuxdeepin/contributor-assistant-github-action@master. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/