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/input/url/url.component.ts

@@ -0,0 +1,21 @@
+import { Component, forwardRef } from '@angular/core'
+import { NG_VALUE_ACCESSOR } from '@angular/forms'
+import { AbstractInputComponent } from '../abstract-input'
+
+@Component({
+  providers: [
+    {
+      provide: NG_VALUE_ACCESSOR,
+      useExisting: forwardRef(() => UrlComponent),
+      multi: true,
+    },
+  ],
+  selector: 'pngx-input-url',
+  templateUrl: './url.component.html',
+  styleUrls: ['./url.component.scss'],
+})
+export class UrlComponent extends AbstractInputComponent<string> {
+  constructor() {
+    super()
+  }
+}