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/theme.properties

@@ -0,0 +1,26 @@
+# Petrolyst's sign-in and sign-out pages, on Keycloak's unstyled base theme: only our own stylesheet, so a Keycloak upgrade cannot
+# restyle them. The brand's home is Petrolyst/design/; css/brand/ holds copies (../check-brand.sh).
+parent=base
+locales=en
+meta=viewport==width=device-width,initial-scale=1
+styles=css/brand/petrolyst_tokens.css css/brand/product_identity_layer.css css/petrolyst.css
+
+kcLoginClass=pl-page
+kcHeaderClass=pl-header
+kcFormCardClass=pl-card
+kcFormGroupClass=pl-group
+kcLabelClass=pl-label
+kcInputClass=pl-input
+kcInputGroup=pl-input-group
+kcInputErrorMessageClass=pl-field-error
+kcAlertClass=pl-alert
+kcAlertTitleClass=pl-alert-text
+kcButtonClass=pl-btn
+kcButtonPrimaryClass=pl-btn-primary
+kcButtonDefaultClass=pl-btn-secondary
+kcButtonBlockClass=pl-btn-block
+kcFormPasswordVisibilityButtonClass=pl-eye
+kcFormPasswordVisibilityIconShow=pl-icon pl-icon-show
+kcFormPasswordVisibilityIconHide=pl-icon pl-icon-hide
+kcResetFlowIcon=pl-icon pl-icon-restart
+kcFormSettingClass=pl-settings