Feature: Allow setting backend configuration settings via the UI (#5126)

* Saving some start on this

* At least partially working for the tesseract parser

* Problems with migration testing need to figure out

* Work around that error

* Fixes max m_pixels

* Moving the settings to main paperless application

* Starting some consumer options

* More fixes and work

* Fixes these last tests

* Fix max_length on OcrSettings.mode field

* Fix all fields on Common & Ocr settings serializers

* Umbrellla config view

* Revert "Umbrellla config view"

This reverts commit fbaf9f4be30f89afeb509099180158a3406416a5.

* Updates to use a single configuration object for all settings

* Squashed commit of the following:

commit 8a0a49dd57
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 23:02:47 2023 -0800

    Fix formatting

commit 66b2d90c50
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 22:36:35 2023 -0800

    Refactor frontend data models

commit 5723bd8dd8
Author: Adam Bogdał <adam@bogdal.pl>
Date:   Wed Dec 20 01:17:43 2023 +0100

    Fix: speed up admin panel for installs with a large number of documents (#5052)

commit 9b08ce1761
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 15:18:51 2023 -0800

    Update PULL_REQUEST_TEMPLATE.md

commit a6248bec2d
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 15:02:05 2023 -0800

    Chore: Update Angular to v17 (#4980)

commit b1f6f52486
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 13:53:56 2023 -0800

    Fix: Dont allow null custom_fields property via API (#5063)

commit 638d9970fd
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 13:43:50 2023 -0800

    Enhancement: symmetric document links (#4907)

commit 5e8de4c1da
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 12:45:04 2023 -0800

    Enhancement: shared icon & shared by me filter (#4859)

commit 088bad9030
Author: Trenton H <797416+stumpylog@users.noreply.github.com>
Date:   Tue Dec 19 12:04:03 2023 -0800

    Bulk updates all the backend libraries (#5061)

* Saving some work on frontend config

* Very basic but dynamically-generated config form

* Saving work on slightly less ugly frontend config

* JSON validation for user_args field

* Fully dynamic config form

* Adds in some additional validators for a nicer error message

* Cleaning up the testing and coverage more

* Reverts unintentional change

* Adds documentation about the settings and the precedence

* Couple more commenting and style fixes

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src-ui/src/app/components/common/input/switch/switch.component.spec.ts

@@ -0,0 +1,39 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing'
+import { SwitchComponent } from './switch.component'
+import {
+  FormsModule,
+  NG_VALUE_ACCESSOR,
+  ReactiveFormsModule,
+} from '@angular/forms'
+
+describe('SwitchComponent', () => {
+  let component: SwitchComponent
+  let fixture: ComponentFixture<SwitchComponent>
+  let input: HTMLInputElement
+
+  beforeEach(async () => {
+    TestBed.configureTestingModule({
+      declarations: [SwitchComponent],
+      providers: [],
+      imports: [FormsModule, ReactiveFormsModule],
+    }).compileComponents()
+
+    fixture = TestBed.createComponent(SwitchComponent)
+    fixture.debugElement.injector.get(NG_VALUE_ACCESSOR)
+    component = fixture.componentInstance
+    fixture.detectChanges()
+    input = component.inputField.nativeElement
+  })
+
+  it('should support use of checkbox', () => {
+    input.checked = true
+    input.dispatchEvent(new Event('change'))
+    fixture.detectChanges()
+    expect(component.value).toBeTruthy()
+
+    input.checked = false
+    input.dispatchEvent(new Event('change'))
+    fixture.detectChanges()
+    expect(component.value).toBeFalsy()
+  })
+})