refactor: rename delta-force-guide to ahsarah-guide and merge into monorepo

- Merge delta-force-guide-server into server/ subdirectory
- Merge delta-force-guide-web into web/ subdirectory
- Rename Java package com.onixbyte.deltaforceguide to com.onixbyte.ahsarahguide
- Rename DeltaForceGuideApplication to AhsarahGuideApplication
- Update all config files, Dockerfiles, and CI workflows
- Update frontend display name and repo links
- Update legal documents (EULA, PrivacyPolicy)
- Create root-level CLAUDE.md, README.md, LICENCE, .gitignore, .gitattributes
- Move CI workflows to root .gitea/workflows/ with working-directory
- Delete .gitlab-ci.yml (legacy)
- Preserve git history from both original repositories

web/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "delta-force-guide-web",
+  "name": "ahsarah-guide-web",
   "private": true,
   "version": "0.0.0",
   "type": "module",