Add terms template with external links to project's terms and conditions

roles/keycloak/files/theme/archlinux/login/terms.ftl

+<#import "template.ftl" as layout>
+<@layout.registrationLayout displayMessage=false; section>
+    <#if section = "header">
+        ${msg("termsTitle")}
+    <#elseif section = "form">
+    <div id="kc-terms-text">
+        ${kcSanitize(msg("termsText"))?no_esc}
+        <ul style="margin-top: 10px;">
+            <li><a target="_blank" rel="noopener noreferrer" href="https://wiki.archlinux.org/index.php/Code_of_conduct">Code of Conduct</a></li>
+            <li><a target="_blank" rel="noopener noreferrer" href="https://gitlab.archlinux.org/archlinux/service-agreements/-/blob/master/terms-of-service.md">Terms of Service</a></li>
+            <li><a target="_blank" rel="noopener noreferrer" href="https://gitlab.archlinux.org/archlinux/service-agreements/-/blob/master/privacy-policy.md">Privacy Policy</a></li>
+        </ul>
+    </div>
+    <form class="form-actions" action="${url.loginAction}" method="POST">
+        <input class="${properties.kcButtonClass!} ${properties.kcButtonPrimaryClass!} ${properties.kcButtonLargeClass!}" name="accept" id="kc-accept" type="submit" value="${msg("doAccept")}"/>
+        <input class="${properties.kcButtonClass!} ${properties.kcButtonDefaultClass!} ${properties.kcButtonLargeClass!}" name="cancel" id="kc-decline" type="submit" value="${msg("doDecline")}"/>
+    </form>
+    <div class="clearfix"></div>
+    </#if>
+</@layout.registrationLayout>