Snell.sh Mango fork

Based on upstream https://raw.githubusercontent.com/xOS/Snell/master/Snell.sh fetched 2026-07-05.

Changes:

viewConfig still prints Surge config.
Adds Mihomo/Nikki JSON node output for Snell v1-v5, compatible with Sub-Store JSON input/output.
For Snell v6, prints a warning instead of invalid Mihomo config because current MetaCubeX docs only list Snell v1/2/3/4/5 support.
updateShell can be pointed at your own raw script URL using environment variables:
- SNELL_SCRIPT_URL=https://gitea.example.com/user/repo/raw/branch/main/Snell.sh
- SNELL_SCRIPT_CN_URL=https://gitea.example.com/user/repo/raw/branch/main/Snell.sh

Install example after publishing to Gitea:

wget -O snell.sh --no-check-certificate https://YOUR-GITEA/user/repo/raw/branch/main/Snell.sh && chmod +x snell.sh && ./snell.sh

Example Mihomo/Sub-Store JSON node:

{"name":"vps","server":"1.2.3.4","port":2345,"psk":"secret","version":5,"reuse":true,"tfo":true,"type":"snell"}