SSP docs: include images + fix CI

docs/getting-started/ssp.mdx

static/images/ssp/1-Login-Verfahren.png

static/images/ssp/11-Destination-erfolgreich-angelegt.png

static/images/ssp/15-Client-loeschen.png

static/images/ssp/16-Destination-zu-Client-hinzufuegen.png

static/images/ssp/16b-Destination-zu-Client-hinzufuegen.png

static/images/ssp/16c-Destination-zu-Client-hinzufuegen.png

static/images/ssp/17-Destination-vom-Client-entfernen.png

static/images/ssp/17b-Destination-vom-Client-entfernen.png

static/images/ssp/18-Client-Detailansicht_Sender.png

static/images/ssp/19-Destination-Detailansicht.png

static/images/ssp/2-Start-Ansicht.png

static/images/ssp/20-Destination-loeschen.png

static/images/ssp/3-Client-hinzufuegen-Sender.png

static/images/ssp/3b-Client-hinzufuegen-Subscriber.png

static/images/ssp/4-Client-hinzufuegen-Sender2.png

static/images/ssp/4b-Client-hinzufuegen-Subscriber2.png

static/images/ssp/5-Client-bearbeiten.png

static/images/ssp/6-Clientverwaltung.png

static/images/ssp/7-Destinationverwaltung.png