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.

pkg/utils/value.go

@@ -0,0 +1,15 @@
+package utils
+
+import "fmt"
+
+func Interface2String(inter interface{}) string {
+	switch inter.(type) {
+	case string:
+		return inter.(string)
+	case int:
+		return fmt.Sprintf("%d", inter.(int))
+	case float64:
+		return fmt.Sprintf("%f", inter.(float64))
+	}
+	return "Not Implemented"
+}