[ADF-2463] Moved doc files to subfolders (#3070)

* [ADF-2463] Moved doc files to subfolders

* [ADF-2463] Fixed broken image links

* [ADF-2463] Moved doc files to subfolders

* [ADF-2463] Fixed broken image links

docs/insights/widget.component.md

@@ -0,0 +1,39 @@
+---
+Added: v2.0.0
+Status: Active
+---
+# Widget component
+
+Base class for standard and custom widget classes.
+
+## Basic Usage
+
+```ts
+import { Component } from '@angular/core';
+import { WidgetComponent } from '@alfresco/adf-core';
+
+@Component({
+    selector: 'custom-editor',
+    template: `
+        <div style="color: red">Look, I'm a custom editor!</div>
+    `
+})
+export class CustomEditorComponent extends WidgetComponent {}
+```
+
+### Properties
+
+| Name | Type | Default | Description |
+| ---- | ---- | ------- | ----------- |
+| readOnly | boolean | false | Does the widget show a read-only value? (ie, can't be edited) |
+| field | [FormFieldModel](../form-field.model.md) |  | Data to be displayed in the field |
+
+## Details
+
+The Widget component is the base class for all standard and custom form widgets. See the
+[Form Extensibility and Customisation](../extensibility.md) page for full details about
+implementing custom widgets.
+
+## See also
+
+-   [Extensibility](../extensibility.md)