Added Alerts Docs to Bootstrap in English (#21730)

* Added Alerts Docs

* Update index.md

* Add Alerts Documentation

* Include Badges

Badges Docs Simplified from Bootstrap Documentation.

guide/english/bootstrap/alerts/index.md

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+---
+title: Alerts
+---
+## Alerts
+
+Make alert messages with the Bootstrap Framework.
+
+#### How To Use:
+The alert is a very easy to use component and below are code snippets that can help you show alerts.
+
+**Code Example:**
+
+`<div class="alert alert-primary" role="alert">A simple primary alert—check it out!</div>` 
+
+To alter the color of the alerts, change the `alert-primary` class to any Bootstrap color class you desire. 
+
+Here is a quick-reference to the [Bootstrap Color Classes](https://getbootstrap.com/docs/4.1/utilities/colors/).
+
+#### More Information: 
+* [Bootstrap Alerts Documentation](https://getbootstrap.com/docs/4.1/components/alerts/)

guide/english/bootstrap/badges/index.md

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+---
+title: Badges
+---
+## Badges
+
+Cleaner way to display notifications and/or figures using the Bootstrap Framework.
+
+#### How To Use:
+The badge is a very easy to use component and below are code snippets that can help you display badges.
+
+**Code Example:**
+
+`<span class="badge badge-primary">Badge Text/Number Here</span>` 
+
+To alter the color of the alerts, change the `badge-primary` class to any Bootstrap color class you desire. 
+
+Here is a quick-reference to the [Bootstrap Color Classes](https://getbootstrap.com/docs/4.1/utilities/colors/).
+
+#### More Information: 
+* [Bootstrap Badge Documentation](https://getbootstrap.com/docs/4.1/components/badge/)