Feature: Implement custom fields for documents (#4502)

Adds custom fields of certain data types, attachable to documents and searchable

Co-Authored-By: Trenton H <797416+stumpylog@users.noreply.github.com>

src-ui/src/app/components/common/page-header/page-header.component.scss

@@ -1,9 +1,9 @@
-.h2 {
+h3 {
     min-height: calc(1.325rem + 0.9vw);
 }
 
 @media (min-width: 1200px) {
-    .h2 {
+    h3 {
         min-height: 2.8rem;
     }
 }