refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

.gitignore

@@ -1,57 +1,80 @@
-.cache
-.gocache*
-.idea
-.vscode
-/upload/
-*.exe
-*.db
-build
-*.log
-/logs/
-.gocache
-
-# If you prefer the allow list template instead of the deny list, see community template:
-# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
-#
-# Binaries for programs and plugins
-*.exe~
-*.dll
-*.so
-*.dylib
-
-# Test binary, built with `go test -c`
-*.test
-
-# Code coverage profiles and other test artifacts
-*.out
-coverage.*
-*.coverprofile
-profile.cov
-
-# Dependency directories (remove the comment below to include it)
-# vendor/
-
-# Go workspace file
-go.work
-go.work.sum
-
-# env file
-.env
-
-# Editor/IDE
-# .idea/
-# .vscode/
-
-.DS_Store
-.codex-cache
-/.gomodcache/
-*.mmdb
-!openflare_agent/internal/geoipdata/GeoLite2-Country.mmdb
-
-*-source
-*-source.zip
-.codex*
-
-/bin/
-.dmux/
-.grok
+# IDE
+.idea/*
+.idea
+!.idea/icon.png
+.vscode
+.pnpm-store/
+
+# logs
+/logs/
+*.log
+
+# config
+config.yaml
+.env
+.env.*
+!.env.example
+
+# sqlite
+*.db
+*.db-journal
+*.db-shm
+*.db-wal
+
+# frontend
+frontend/build
+frontend/disk
+frontend/node_modules/*
+frontend/.next/*
+frontend/next-env.d.ts
+frontend/package-lock.json
+frontend/.env
+*.tsbuildinfo
+
+# os
+.DS_Store
+Thumbs.db
+
+# build
+/build/
+/bin/
+/dist/
+
+# go workspace
+go.work
+go.work.sum
+main
+
+# upload
+/uploads/
+s3_cache
+
+/frontend/.next/
+/data/
+/internal/router/dist/
+/frontend/out/
+/internal/router/root/dist/
+.dmux/
+
+# test coverage
+*.out
+coverage.*
+*.coverprofile
+profile.cov
+
+# generic ignores
+.cache
+.gocache*
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*-source
+*-source.zip
+.codex*
+.grok
+/.gomodcache/
+*.mmdb
+!openflare_agent/internal/geoipdata/GeoLite2-Country.mmdb