Add generic file sync and improve UI for game launch

Introduced GenericFilesService to fetch and validate required game files before launching. Updated launcher version to beta and added support for AuthlibInjector agent in launch options. Improved avatar rendering and button states in the UI, including pixelated avatar display and disabled state handling for logout during game launch.

wwwroot/assets/css/logged.css

@@ -54,6 +54,8 @@ main > aside > nav > button:first-of-type > img {
     width: 60px;
     height: 60px;
     border-radius: 5px;
+    image-rendering: pixelated;
+    image-rendering: crisp-edges;
 }
 
 main > aside > nav > button:nth-child(2) {
@@ -70,7 +72,7 @@ main > aside > nav > button:last-child {
     margin-bottom: 0;
 }
 
-main > aside > nav > button:has(> i.fas.fa-sign-out-alt):hover {
+main > aside > nav > button:has(> i.fas.fa-sign-out-alt):not(:disabled):hover {
     color: #ff4747;
 }
 
@@ -124,6 +126,11 @@ button.play:disabled {
     filter: grayscale(100%);
 }
 
+button.logout:disabled {
+    cursor: not-allowed;
+    filter: brightness(0.70);
+}
+
 button.play > i {
     margin-right: 5px;
     font-size: 14px;