New theme support for account (Keycloak.v3) and others (Keycloak.v2). `d4science.v2` theme has been deprecated (and removed from declarations) and now only `d4science` will be the theme to be used/extended.
Now the minor part of the version (the `24` in the `2.24.x`) shows the compatibility to the specific Keycloak major version, in this case `24.x.x`
- [#19518] Implemented the Keycloak "d4science" login parametric template.
- Each new gateway that does not implement its own specific login template should use by default this base "d4science" template. However, it is possible to set some parameters in `<keycloak_home>/themes/<gatewayname>/login/themes.properties` file to do some customizations such as logo, background, colors, and some links (see for example parameters of dev4.d4science.org and next.d4science.org themes).