Add Umbrix CLI icon for Windows

- Added umbrix-cli.ico (207KB, multi-layer icon from main app)
- Updated Makefile: use umbrix-cli.ico instead of hiddify-cli.ico
- HiddifyCli.exe now displays Umbrix icon instead of Hiddify branding

Makefile

@@ -58,7 +58,7 @@ windows-amd64:
 	go install -mod=readonly github.com/akavel/rsrc@latest ||echo "rsrc error in installation"
 	go run ./cli tunnel exit
 	cp $(BINDIR)/$(LIBNAME).dll ./$(LIBNAME).dll 
-	$$(go env GOPATH)/bin/rsrc -ico ./assets/hiddify-cli.ico -o ./cli/bydll/cli.syso ||echo "rsrc error in syso"
+	$$(go env GOPATH)/bin/rsrc -ico ./assets/umbrix-cli.ico -o ./cli/bydll/cli.syso ||echo "rsrc error in syso"
 	env GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc CGO_LDFLAGS="$(LIBNAME).dll" $(GOBUILDSRV) -o $(BINDIR)/$(CLINAME).exe ./cli/bydll
 	rm ./$(LIBNAME).dll
 	make webui