chore: install claude code in ddev container for security reasons

.ddev/addon-metadata/claude-code/manifest.yaml

@@ -0,0 +1,12 @@
+name: claude-code
+repository: /Users/fromme/Development/Misc/ddev-claude-code
+version: ""
+install_date: "2026-01-07T12:08:23+01:00"
+project_files:
+    - web-build/Dockerfile.claude-code
+    - commands/web/claude
+    - config.claude-code.yaml
+    - claude-code/.claude.json
+    - claude-code/.gitignore
+global_files: []
+removal_actions: []