Reset Zed editor configuration to defaults

Remove custom settings.json to restore Zed to default configuration. Also update CLAUDE.md with docker/arty usage notes and arty.yml to include ruby-build plugin.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

arty.yml

@@ -18,17 +18,6 @@ references:
 - url: git@github.com:butter-sh/butter-sh.github.io.git
   into: Projects/butter-sh
   env: dev
-- url: git@github.com:valknarogg/home-pictures.git
-  into: Bilder
-  env: dev
-- url: git@github.com:valknarogg/home-videos.git
-  into: Videos
-  ref: main
-  env: dev
-- url: git@github.com:valknarogg/home-music.git
-  into: Musik
-  ref: main
-  env: dev
 - url: git@github.com:valknarogg/docker-compose.git
   into: Projects/docker-compose
   env:
@@ -55,6 +44,8 @@ references:
   into: .gvm
 - url: https://github.com/rbenv/rbenv.git
   into: .rbenv
+- url: https://github.com/rbenv/ruby-build.git
+  into: .rbenv/plugins/ruby-build
 - url: https://github.com/pyenv/pyenv.git
   into: .pyenv
 - url: https://github.com/ohmyzsh/ohmyzsh.git