added list groups documentation

docs/en/UI/AspNetCore/Tag-Helpers/List-Groups.md

@@ -0,0 +1,78 @@
+# List Groups
+
+## Introduction
+
+`abp-list-group` is the main container for list group content. 
+
+Basic usage:
+
+````xml
+<abp-list-group>
+    <abp-list-group-item>Cras justo odio</abp-list-group-item>
+    <abp-list-group-item>Dapibus ac facilisis in</abp-list-group-item>
+    <abp-list-group-item>Morbi leo risus</abp-list-group-item>
+    <abp-list-group-item>Vestibulum at eros</abp-list-group-item>
+</abp-list-group>
+````
+
+
+
+## Demo
+
+See the [list groups demo page](https://bootstrap-taghelpers.abp.io/Components/ListGroups) to see it in action.
+
+## Attributes
+
+### flush
+
+A value indicates `abp-list-group` items to remove some borders and rounded corners to render list group items edge-to-edge in a parent container. Should be one of the following values:
+
+* `false` (default value)
+* `true`
+
+### active
+
+A value indicates if an `abp-list-group-item` to be active. Should be one of the following values:
+
+* `false` (default value)
+* `true`
+
+### disabled
+
+A value indicates if an `abp-list-group-item` to be disabled. Should be one of the following values:
+
+* `false` (default value)
+* `true`
+
+### href
+
+A value indicates if an `abp-list-group-item` has a link. Should be a string link value. 
+
+### type
+
+A value indicates an `abp-list-group-item` style class with a stateful background and color. Should be one of the following values:
+
+* `Default` (default value)
+* `Primary`
+* `Secondary`
+* `Success`
+* `Danger`
+* `Warning`
+* `Info`
+* `Light`
+* `Dark`
+* `Link`
+
+### Additional content
+
+`abp-list-group-item` can also contain additional HTML elements like spans.
+
+Example:
+
+````xml
+<abp-list-group>
+    <abp-list-group-item>Cras justo odio <span abp-badge-pill="Primary">14</span></abp-list-group-item>
+    <abp-list-group-item>Dapibus ac facilisis in <span abp-badge-pill="Primary">2</span></abp-list-group-item>
+    <abp-list-group-item>Morbi leo risus <span abp-badge-pill="Primary">1</span></abp-list-group-item>
+</abp-list-group>
+````