refactor(deps): upgrade bootstrap from v4.6 to v5.2

- update class name of the spacing, font style, cards and toasts
- update attribute names &  tooltip usage
- remove custom smooth scroll
- syntax colors

_sass/colors/dark-typography.scss

@@ -115,10 +115,6 @@
   }
 
   .categories {
-    &.card {
-      border-color: var(--main-border-color);
-    }
-
     .card-header {
       background-color: var(--card-header-bg);
     }

_sass/colors/light-typography.scss

@@ -98,6 +98,7 @@
   }
 
   /* Categories */
+  --categories-border: rgba(0, 0, 0, 0.125);
   --categories-hover-bg: var(--btn-border-color);
   --categories-icon-hover-color: darkslategray;