[ADF-1549] Added docs for Upload, Userinfo, Viewer and Webscript (#2359)

docs/file-uploading-dialog.component.md

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+# File Uploading Dialog Component
+
+Shows a dialog listing all the files uploaded with the Upload Button or Drag Area components.
+
+<!-- markdown-toc start - Don't edit this section.  npm run toc to generate it-->
+
+<!-- toc -->
+
+- [Basic Usage](#basic-usage)
+  * [Properties](#properties)
+- [Details](#details)
+
+<!-- tocstop -->
+
+<!-- markdown-toc end -->
+
+## Basic Usage
+
+```html
+<file-uploading-dialog></file-uploading-dialog>
+```
+
+### Properties
+
+| Name | Type | Default | Description |
+| --- | --- | --- | --- |
+| position | string | 'right' | Dialog position. Accepted values are 'left' or 'right' |
+
+## Details
+
+This component should be used in combination with upload button or drag-and-drop area.