chore: tidy package manifest and docs (drop .pi artifact in history)

README.md

@@ -4,13 +4,17 @@
 
 ## Install
 
-Use it as a local package root today:
+Local path:
 
 ```bash
 pi install /absolute/path/to/subagents
 ```
 
-After this folder is moved into its own repository, the same package can be installed from git.
+Git:
+
+```bash
+pi install https://gitea.rwiesner.com/pi/pi-subagents
+```
 
 ## Resources