docs: update README to reflect arty-based setup and removed Ansible playbook

- Replace Ansible provisioning workflow with arty installation scripts
- Update arty.yml configuration to show simplified structure
- Add HiDrive integration documentation for .zlogin
- Update environment structure to show version managers and symbolic links
- Remove references to playbook.yml and environment-based repo management
- Add documentation for new installation scripts (debian, rust, zed, claude, etc.)
- Clean up .zshenv and remove .last_pwd tracking file

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

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

.config/zed/settings.json

@@ -0,0 +1,22 @@
+// Zed settings
+//
+// For information on how to configure Zed, see the Zed
+// documentation: https://zed.dev/docs/configuring-zed
+//
+// To see all of Zed's default settings without changing your
+// custom settings, run `zed: open default settings` from the
+// command palette (cmd-shift-p / ctrl-shift-p)
+{
+  "terminal": {
+    "shell": {
+      "program": "/usr/bin/zsh"
+    }
+  },
+  "ui_font_size": 16,
+  "buffer_font_size": 15,
+  "theme": {
+    "mode": "system",
+    "light": "One Light",
+    "dark": "One Dark"
+  }
+}