New: Native Theme Engine

Co-Authored-By: Zak Saunders <1936903+thezak48@users.noreply.github.com>

frontend/src/System/Events/LogsTableDetailsModal.css

@@ -6,8 +6,8 @@
   padding: 10px;
   border: 1px solid #ccc;
   border-radius: 4px;
-  background-color: #f5f5f5;
-  color: #3a3f51;
+  background-color: var(--logEventsBackgroundColor);
+  color: var(--textColor);
   white-space: pre;
   word-wrap: break-word;
   word-break: break-all;

frontend/src/System/Events/LogsTableRow.css

@@ -17,15 +17,15 @@
 }
 
 .warn {
-  color: $warningColor;
+  color: var(--warningColor);
 }
 
 .error {
-  color: $dangerColor;
+  color: var(--dangerColor);
 }
 
 .fatal {
-  color: $purple;
+  color: var(--purple);
 }
 
 .actions {