Draft: Adding Keywind as supported theme

[paulwer]

!!UNTESTED!!

i created an implementation for the keywind theme, where you can start working on.

Considder KEYWIND_Integration.md for your next steps.

The attributes params integrations are present within document.ftl

as an alternative aproach, you can just fork the repo, do the adjustment like me in document.ftl and integrate npm run build && npm run build:jar to get an other ipc to integrate within the docker image. if you need any help, just reach out :)

[paulwer]

https://github.com/p2-inc/keycloak-themes/issues/9

[paulwer]

@xgp