feat: integrate FontAwesome icons across various components

- Updated apartment-list component to use FontAwesome icons for better visual representation.
- Refactored brand-mark component to utilize FontAwesome for the brand icon.
- Enhanced dashboard-page with FontAwesome icons for improved navigation.
- Replaced SVG icons with FontAwesome in settings-page for consistency and better performance.
- Updated sign-in-page to use FontAwesome for the sign-in action icon.
- Refactored tenant-card to incorporate FontAwesome icons for attachments.
- Enhanced workspace-navigation with FontAwesome icons for all navigation items.
- Applied consistent styling for fa-icon elements across components.

frontend/src/app/components/tenant-card/tenant-card.css

@@ -95,6 +95,10 @@
   width: 16px;
   margin-right: 8px;
 }
+.attachment-download-icon svg {
+  width: 100%;
+  height: 100%;
+}
 .attachment-file-name {
   min-width: 0;
   overflow-wrap: anywhere;
@@ -107,6 +111,14 @@
   padding: 0 5px;
   font-size: 0.9rem;
 }
+.attachment-delete fa-icon {
+  width: 1em;
+  height: 1em;
+}
+.attachment-delete fa-icon svg {
+  width: 100%;
+  height: 100%;
+}
 .upload-action {
   display: block;
   min-height: 40px;