Improved error screen (#841)

* improve the error screen visuals

* comment out placeholder buttons

* run formatter

* Refactor DeckyErrorBoundary styles and text

- Removed gray text class usage
- Removed styles reminiscent of Steam BPM
- Fixed typos

* Further refactor of DeckyErrorBoundary.tsx

- Change background/text of buttons to be closer to Steam Deck UI
- Make panel background not reliant on transparency and have a neutral gray
- Bold "likely occurred" text
- Make swipe prompt appear in the center of a horizontal bar, drawing more attention to it
- Make "An error occurred" text smaller, as it isn't helpful for troubleshooting
- Add text clarifying solutions are in recommended order and how to get more help
- Add "Retry the action or restart" to the left of Retry, Restart Steam, and Restart Decky buttons
- Move disabling Decky to beneath the Decky update checking

* Revert header boldness change

* add disable plugin buttons to error screen

* Set background to black

---------

Co-authored-by: EMERALD <info@eme.wtf>

backend/decky_loader/utilities.py

@@ -82,6 +82,7 @@ class Utilities:
             context.ws.add_route("utilities/_call_legacy_utility", self._call_legacy_utility)
             context.ws.add_route("utilities/enable_plugin", self.enable_plugin)
             context.ws.add_route("utilities/disable_plugin", self.disable_plugin)
+            context.ws.add_route("utilities/set_all_plugins_disabled", self.set_all_plugins_disabled)
 
             context.web_app.add_routes([
                 post("/methods/{method_name}", self._handle_legacy_server_method_call)
@@ -503,4 +504,13 @@ class Utilities:
             disabled_plugins.remove(name)
             await self.set_setting("disabled_plugins", disabled_plugins)
             
-        await self.context.plugin_loader.import_plugin(path.join(plugin_dir, "main.py"), plugin_folder)
+        await self.context.plugin_loader.import_plugin(path.join(plugin_dir, "main.py"), plugin_folder)
+        
+    async def set_all_plugins_disabled(self):
+        disabled_plugins: List[str] = await self.get_setting("disabled_plugins", [])
+
+        for name, _ in self.context.plugin_loader.plugins.items():
+            if name not in disabled_plugins:
+                disabled_plugins.append(name)
+
+        await self.set_setting("disabled_plugins", disabled_plugins)