Rename media-verify addon to Proofmode, remove CDR prefixes

Renames the addon from zammad-addon-media-verify to zammad-addon-proofmode
and removes all cdr_ prefixes from file names and class names per project
naming convention.

- Package: @link-stack/zammad-addon-proofmode (displayName: Proofmode)
- Classes: ProofmodeVerify, ProofmodeVerifyJob
- Files: proofmode_verify.rb, proofmode_verify_job.rb
- Settings: proofmode_verify_enabled
- Migration dir: db/addon/proofmode/

https://claude.ai/code/session_01GJYbRCFFJCJDAEcEVbD36N

packages/zammad-addon-proofmode/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true
+  },
+  "include": ["scripts"]
+}