UI: Add progress bar for re-packaging shaders (#4805)

* feat: introduce new shader loading state for progress tracking when writing shaders to disk

* fix: move translation to bottom of locale file

* fix: change back to foreach and add requested spacing between lines

* style: fix formatting

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

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Co-authored-by: gdkchan <gab.dark.100@gmail.com>

src/Ryujinx.Ava/Assets/Locales/en_US.json

@@ -644,5 +644,6 @@
   "UserEditorTitleCreate" : "Create User",
   "SettingsTabNetworkInterface": "Network Interface:",
   "NetworkInterfaceTooltip": "The network interface used for LAN features",
-  "NetworkInterfaceDefault": "Default"
+  "NetworkInterfaceDefault": "Default",
+  "PackagingShaders": "Packaging Shaders"
 }