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

server/src/main/resources/application.yaml

@@ -1,6 +1,6 @@
 spring:
   application:
-    name: delta-force-guide
+    name: ahsarah-guide
   cache:
     type: redis
     redis:
@@ -42,8 +42,8 @@ mybatis:
   configuration:
     log-impl: org.apache.ibatis.logging.slf4j.Slf4jImpl
     map-underscore-to-camel-case: true
-  type-aliases-package: com.onixbyte.deltaforceguide.domain.entity
-  type-handlers-package: com.onixbyte.deltaforceguide.mapper.handler
+  type-aliases-package: com.onixbyte.ahsarahguide.domain.entity
+  type-handlers-package: com.onixbyte.ahsarahguide.mapper.handler
   mapper-locations: classpath:/mapper/*.xml
 
 logging: