ProConnect - Display and use dedicated button

[Gaetanbrl]

ref ProConnect proposal

To use ProConnect, a user will need to click on ProConnect button.

Button details is available here :

https://github.com/numerique-gouv/proconnect-documentation/blob/main/doc_fs/bouton_proconnect.md

[Gaetanbrl]

Currently,

Authenntication UI display a standard button :

... due to this config (file gateway/security.yaml):

georchestra:
  gateway:
    security:
      oauth2:
        enabled: true
...........
spring:
  security:
    oauth2:
      client:
        registration:
          cas-oauth2:
................

[Gaetanbrl]

Here a config that seems correct (but depends of #161) :

spring:
  security:
    oauth2:
      client:
        registration:
          proconnect:
            client-name: proconnect
            client-id: idtochange
            client-secret: secrettochange
            authorization-grant-type: authorization_code
            redirect-uri: "https://dev.gis.jdev/login"
            scope: openid,siret,email
        provider:
          proconnect:
            authorization-uri: https://fca.integ01.dev-agentconnect.fr/api/v2/authorize
            token-uri: https://fca.integ01.dev-agentconnect.fr/api/v2/token
            user-info-uri: https://fca.integ01.dev-agentconnect.fr/api/v2/userinfo
            end-session-uri: https://fca.integ01.dev-agentconnect.fr/api/v2/session/end
            user-name-attribute: sub