Add state enums and HomeLayout styling improvements

Introduced generated stateE15Enum and stateFdaEnum TypeScript types for both private and public API models. Updated HomeLayout to use a new CSS module for layout styling, and adjusted navbar centering logic. Commented out reset.css in index.html and made minor CSS cleanups.

frontend/src/components/navbar/navbar.module.css

@@ -1,7 +1,9 @@
 .navbar {
     width: 50%;
     width: max-content;
-    margin: auto;
+    margin: 0;
+    margin-left: auto;
+    margin-right: auto;
     padding: 0 2em;
     background-color: var(--c-boxes);
     color: white;