fix: complete rebranding from Hiddify to Umbrix in packages

Package metadata changes:
- Package name: hiddify → umbrix
- Display name: Hiddify → Umbrix
- Maintainer: hiddify → umbrix
- Email: linux@hiddify.com → linux@umbrix.com
- Keywords: updated to Umbrix, Clash, Sing-box
- Install message: 'Installed Umbrix VPN'
- Icon: using logo/ic_launcher_playstore.png

All Linux packages (DEB/RPM/AppImage) now fully rebranded.
Note: HiddifyCli binary name preserved for compatibility.

linux/packaging/deb/make_config.yaml

@@ -1,31 +1,30 @@
-display_name: Hiddify
-package_name: hiddify
+display_name: Umbrix
+package_name: umbrix
 maintainer:
-  name: hiddify
-  email: linux@hiddify.com
+  name: umbrix
+  email: linux@umbrix.com
 
 priority: optional
 section: x11
 installed_size: 6604
 essential: false
-icon: ./assets/images/source/ic_launcher_border.png
+icon: ./logo/ic_launcher_playstore.png
 
 postinstall_scripts:
-  - echo "Installed Hiddify"
+  - echo "Installed Umbrix VPN"
 postuninstall_scripts:
-  - echo "Surprised Why?"
+  - echo "Uninstalled Umbrix"
 
 keywords:
-  - Hiddify
+  - Umbrix
   - Proxy
   - VPN
   - V2ray
-  - Nekoray
   - Xray
-  - Psiphon
-  - OpenVPN
+  - Clash
+  - Sing-box
 
-generic_name: Hiddify
+generic_name: Umbrix
 
 categories:
   - Network