Keycloak theme for the sign-in and sign-out pages (PD-23, PD-26)

Realm petrolyst's login theme, on Keycloak's unstyled base: a slate panel with the logo and its line
beside the form on a soft card; on a phone a slate band above it; light and dark. Satoshi stays out
of Git by its licence (build.sh). The README adds the install steps. Not deployed.

Bands: none (identity theme).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

keycloak/themes/petrolyst/login/info.ftl

@@ -0,0 +1,24 @@
+<#import "template.ftl" as layout>
+<@layout.registrationLayout displayMessage=false; section>
+    <#if section = "header">
+        <#if messageHeader??>
+            ${kcSanitize(msg("${messageHeader}"))?no_esc}
+        <#else>
+            ${message.summary}
+        </#if>
+    <#elseif section = "form">
+    <div id="kc-info-message">
+        <p class="instruction"><#if messageHeader??>${message.summary}</#if><#if requiredActions??><#list requiredActions>: <b><#items as reqActionItem>${kcSanitize(msg("requiredAction.${reqActionItem}"))?no_esc}<#sep>, </#items></b></#list><#else></#if></p>
+        <#if skipLink??>
+        <#else>
+            <#if pageRedirectUri?has_content>
+                <p><a href="${pageRedirectUri}">${kcSanitize(msg("backToApplication"))?no_esc}</a></p>
+            <#elseif actionUri?has_content>
+                <p><a href="${actionUri}">${kcSanitize(msg("proceedWithAction"))?no_esc}</a></p>
+            <#elseif (client.baseUrl)?has_content>
+                <p><a href="${client.baseUrl}">${kcSanitize(msg("backToApplication"))?no_esc}</a></p>
+            </#if>
+        </#if>
+    </div>
+    </#if>
+</@layout.registrationLayout>