Feature: Implement Keycloak authentification

[schuelet]

FSKX Creation UI #23

The FSKX Creation UI should have a keycloak authentification prompt. On loading the page for the first time the user is asked to log into keycloak. Challenges:

• check, if there is already an active keycloak session token and if that token is still active (time out is usually a few hours). If so, the keycloak login prompt should not show up
• have a logout button
• send the user's keycloak token (bearer token) to the https://apiserver.risk-ai-cloud.com/create_fskx backend (instead of the hardcoded basic token as it is right now)

[schuelet]

@ahsan64 Here is an example of the keycloak for the backend: https://github.com/KIDA-BfR/PoC-for-FSKX-API-server/blob/feature/fskx_create/fskxserver/fskxserver/fskxserver.py

Since the user logs into the fronted and you just pass the bearer token to the backend, here an example (html with javascript) for the frontend:

keycloak_example.html.txt

[schuelet]

@ahsan64 Good job!