Move .env into skills/ for easy install

- Added skills/_env_loader.py - shared env loader for all scripts
- Updated 17 scripts to use load_unified_env()
- Updated install-skills.sh to copy .env into skills/
- Updated README with simpler OpenClaw install instructions
- .env in skills/ is gitignored (credentials stay private)

README.md

@@ -58,27 +58,21 @@ cp -r skills/* .opencode/skills/
 
 ## OpenClaw Installation
 
-For OpenClaw, you need to install both skills AND credentials:
+For OpenClaw, just copy the skills folder - it now includes `.env` with all credentials:
 
 ```bash
 # Option 1: Local OpenClaw folder
-mkdir -p ~/.openclaw/skills
-cp -r skills/* ~/.openclaw/skills/
-cp .env ~/.openclaw/.env
+cp -r skills ~/.openclaw/skills
 
 # Option 2: Remote server SSH mount (e.g. ~/openclaw-vps/)
-mkdir -p ~/openclaw-vps/.openclaw/skills
-cp -r skills/* ~/openclaw-vps/.openclaw/skills/
-cp .env ~/openclaw-vps/.openclaw/.env
+cp -r skills ~/openclaw-vps/.openclaw/skills
 
 # Option 3: rsync for faster sync over SSH
 rsync -av skills/ user@remote-server:.openclaw/skills/
-rsync -av .env user@remote-server:.openclaw/.env
 ```
 
 **What to copy:**
-- `skills/` - All skill folders
-- `.env` - Credentials (API keys, tokens)
+- `skills/` - Includes all skills AND `.env` with credentials
 
 **Note:** OpenClaw searches for skills in `~/.openclaw/skills` or any `*/.openclaw/skills` folder.