chore: import keycloak theme from upstream

https://github.com/keycloak/keycloak/tree/main/themes/src/main/resources/theme/keycloak

entropia/account/theme.properties

@@ -0,0 +1,14 @@
+parent=base
+import=common/keycloak
+
+styles=css/account.css
+stylesCommon=node_modules/patternfly/dist/css/patternfly.min.css node_modules/patternfly/dist/css/patternfly-additions.min.css
+
+##### css classes for form buttons
+# main class used for all buttons
+kcButtonClass=btn
+# classes defining priority of the button - primary or default (there is typically only one priority button for the form)
+kcButtonPrimaryClass=btn-primary
+kcButtonDefaultClass=btn-default
+# classes defining size of the button
+kcButtonLargeClass=btn-lg