feat: Identity brokering (#730)

* feat: add/ remove external idps

* feat: external idp add /remove

* fix: auth proto

* fix: handle login

* feat: loginpolicy on authrequest

* feat: idp providers on login

* feat: link external idp

* fix: check login policy on check username

* feat: add mapping fields for idp config

* feat: use user org id if existing

* feat: use user org id if existing

* feat: register external user

* feat: register external user

* feat: user linking

* feat: user linking

* feat: design external login

* feat: design external login

* fix: tests

* fix: regenerate login design

* feat: next step test linking process

* feat: next step test linking process

* feat: cascade remove external idps on user

* fix: tests

* fix: tests

* feat: external idp requsts on users

* fix: generate protos

* feat: login styles

* feat: login styles

* fix: link user

* fix: register user on specifig org

* fix: user linking

* fix: register external, linking auto

* fix: remove unnecessary request from proto

* fix: tests

* fix: new oidc package

* fix: migration version

* fix: policy permissions

* Update internal/ui/login/static/i18n/en.yaml

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* Update internal/ui/login/static/i18n/en.yaml

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* Update internal/ui/login/handler/renderer.go

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* Update internal/ui/login/handler/renderer.go

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* fix: pr requests

* Update internal/ui/login/handler/link_users_handler.go

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* fix: pr requests

* fix: pr requests

* fix: pr requests

* fix: login name size

* fix: profile image light

* fix: colors

* fix: pr requests

* fix: remove redirect uri validator

* fix: remove redirect uri validator

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

internal/auth_request/model/request.go

@@ -18,6 +18,10 @@ const (
 	AuthRequestTypeSAML
 )
 
+const (
+	OrgIDScope = "urn:zitadel:organisation:id:"
+)
+
 type AuthRequestOIDC struct {
 	Scopes        []string
 	ResponseType  OIDCResponseType