feat: add registry config, image upload/download, and OCI format support

Backend:
- Add registry_address configuration API (GET/POST)
- Add tar image upload with OCI and Docker format support
- Add image download with streaming optimization
- Fix blob download using c.Send (Fiber v3 SendStream bug)
- Add registry_address prefix stripping for all OCI v2 endpoints
- Add AGENTS.md for project documentation

Frontend:
- Add settings store with Snackbar notifications
- Add image upload dialog with progress bar
- Add download state tracking with multi-stage feedback
- Replace alert() with MUI Snackbar messages
- Display image names without registry_address prefix

🤖 Generated with [Qoder](https://qoder.com)

pkg/tool/uuid.go

@@ -0,0 +1,14 @@
+package tool
+
+import (
+	"github.com/gofrs/uuid"
+)
+
+func NewV4() (string, error) {
+	uid, err := uuid.NewV4()
+	if err != nil {
+		return "", err
+	}
+
+	return uid.String(), nil
+}