Remove sidebar navigation and floating elements

Deleted NavMenu component and its styles, removed sidebar layout from MainLayout, and cleaned up related CSS. The Home page was simplified by removing floating icons and animation effects. This streamlines the UI and focuses on main content presentation.

MovieActorLookup/wwwroot/app.css

@@ -18,10 +18,6 @@ a, .btn-link {
   box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
 }
 
-.content {
-    padding-top: 1.1rem;
-}
-
 h1:focus {
     outline: none;
 }
@@ -52,12 +48,6 @@ h1:focus {
     border-color: #929292;
 }
 
-.page .content {
-    padding-top: 24px !important;
-    margin: 0 auto !important;
-    max-width: 1200px !important;
-}
-
 /*movie card styling*/
 
 .movie-poster {