Add Bootstrap Icons to alerts docs (#33690)

* Add Bootstrap Icons to alerts docs

* Update site/content/docs/5.0/components/alerts.md

Co-authored-by: Gaël Poupard <ffoodd@users.noreply.github.com>

* Update alerts.md

Co-authored-by: Gaël Poupard <ffoodd@users.noreply.github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

site/content/docs/5.0/components/alerts.md

@@ -49,6 +49,62 @@ Alerts can also contain additional HTML elements like headings, paragraphs and d
 </div>
 {{< /example >}}
 
+### Icons
+
+Similarly, you can use [flexbox utilities]({{< docsref "/utilities/flex" >}}) and [Bootstrap Icons]({{ .Site.Params.icons }}) to create alerts with icons. Depending on your icons and content, you may want to add more utilities or custom styles.
+
+{{< example >}}
+<div class="alert alert-primary d-flex align-items-center" role="alert">
+  <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="currentColor" class="bi bi-exclamation-triangle-fill flex-shrink-0 me-2" viewBox="0 0 16 16">
+    <path d="M8.982 1.566a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566zM8 5c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995A.905.905 0 0 1 8 5zm.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2z"/>
+  </svg>
+  <div>
+    An example alert with an icon
+  </div>
+</div>
+{{< /example >}}
+
+Need more than one icon for your alerts? Consider using more Bootstrap Icons and making a local SVG sprite like so to easily reference the same icons repeatedly.
+
+{{< example >}}
+<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
+  <symbol id="check-circle-fill" fill="currentColor" viewBox="0 0 16 16">
+    <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z"/>
+  </symbol>
+  <symbol id="info-fill" fill="currentColor" viewBox="0 0 16 16">
+    <path d="M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16zm.93-9.412-1 4.705c-.07.34.029.533.304.533.194 0 .487-.07.686-.246l-.088.416c-.287.346-.92.598-1.465.598-.703 0-1.002-.422-.808-1.319l.738-3.468c.064-.293.006-.399-.287-.47l-.451-.081.082-.381 2.29-.287zM8 5.5a1 1 0 1 1 0-2 1 1 0 0 1 0 2z"/>
+  </symbol>
+  <symbol id="exclamation-triangle-fill" fill="currentColor" viewBox="0 0 16 16">
+    <path d="M8.982 1.566a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566zM8 5c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995A.905.905 0 0 1 8 5zm.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2z"/>
+  </symbol>
+</svg>
+
+<div class="alert alert-primary d-flex align-items-center" role="alert">
+  <svg class="bi flex-shrink-0 me-2" width="24" height="24"><use xlink:href="#info-fill"/></svg>
+  <div>
+    An example alert with an icon
+  </div>
+</div>
+<div class="alert alert-success d-flex align-items-center" role="alert">
+  <svg class="bi flex-shrink-0 me-2" width="24" height="24"><use xlink:href="#check-circle-fill"/></svg>
+  <div>
+    An example success alert with an icon
+  </div>
+</div>
+<div class="alert alert-warning d-flex align-items-center" role="alert">
+  <svg class="bi flex-shrink-0 me-2" width="24" height="24"><use xlink:href="#exclamation-triangle-fill"/></svg>
+  <div>
+    An example warning alert with an icon
+  </div>
+</div>
+<div class="alert alert-danger d-flex align-items-center" role="alert">
+  <svg class="bi flex-shrink-0 me-2" width="24" height="24"><use xlink:href="#exclamation-triangle-fill"/></svg>
+  <div>
+    An example danger alert with an icon
+  </div>
+</div>
+{{< /example >}}
+
 ### Dismissing
 
 Using the alert JavaScript plugin, it's possible to dismiss any alert inline. Here's how: