fix: installer prints the name once; add CLAUDE.md with the versioning rule

- install.sh said "Installed supaspin supaspin 1.1.0." because --version now includes the name; it now says
  "Installed supaspin 1.1.1."
- CLAUDE.md: tells AI agents to read Igor's global rules first, and states the versioning rule (number in VERSION,
  code and README together, semantic versioning, major bumps only with Igor's yes, a git tag vX.Y.Z after every merge)
- version 1.1.0 -> 1.1.1

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -1,6 +1,6 @@
 # supaspin
 
-Version 1.1.0
+Version 1.1.1
 
 Create, list, show and delete throwaway [Supabase](https://supabase.com) instances on a
 single-node [microk8s](https://microk8s.io) server, from a terminal menu.
@@ -108,7 +108,7 @@ sudo supaspin push-env N TARGET [--port P] [--key FILE] [--dry-run]   # see "Cop
 sudo supaspin delete N [--yes]
 sudo supaspin mail                    # change the saved default mail settings
 sudo supaspin setup                   # change settings
-supaspin --version                    # prints "supaspin 1.1.0"
+supaspin --version                    # prints "supaspin 1.1.1"
 ```
 
 ### Connecting your app