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/components/ui/collapsible.tsx

@@ -0,0 +1,28 @@
+"use client"
+
+import * as React from "react"
+import {Collapsible as CollapsiblePrimitive} from "radix-ui"
+
+function Collapsible({
+  ...props
+}: React.ComponentProps<typeof CollapsiblePrimitive.Root>) {
+  return <CollapsiblePrimitive.Root data-slot="collapsible" {...props} />
+}
+
+function CollapsibleTrigger({
+  ...props
+}: React.ComponentProps<typeof CollapsiblePrimitive.Trigger>) {
+  return (
+    <CollapsiblePrimitive.Trigger data-slot="collapsible-trigger" {...props} />
+  )
+}
+
+function CollapsibleContent({
+  ...props
+}: React.ComponentProps<typeof CollapsiblePrimitive.Content>) {
+  return (
+    <CollapsiblePrimitive.Content data-slot="collapsible-content" {...props} />
+  )
+}
+
+export { Collapsible, CollapsibleTrigger, CollapsibleContent }