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.

frontend/app/(docs)/docs/terms-of-service/page.tsx

@@ -0,0 +1,17 @@
+import {LegalPageLayout} from "@/components/common/docs/legal-page-layout"
+import {TERMS_LAST_UPDATED, termsSections} from "@/components/common/docs/terms"
+
+export default function TermsOfServicePage() {
+  return (
+    <LegalPageLayout
+      title="服务协议 (Terms)"
+      lastUpdated={TERMS_LAST_UPDATED}
+      sections={termsSections}
+      description={
+        <span>
+          为了保障您的合法权益，请您仔细阅读以下条款。
+        </span>
+      }
+    />
+  )
+}