chore: Move from app.php to app bootstrap

Remove a bunch of deprecated stuff

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

Author: CarlSchwan

appinfo/app.php

@@ -26,6 +26,7 @@ While theoretically any other authentication provider implementing either one of
 	<namespace>User_SAML</namespace>
 	<types>
 		<authentication/>
+		<dav/>
 	</types>
 	<documentation>
 		<admin>https://portal.nextcloud.com/article/configuring-single-sign-on-10.html</admin>
@@ -60,4 +61,9 @@ While theoretically any other authentication provider implementing either one of
 		<admin>OCA\User_SAML\Settings\Admin</admin>
 		<admin-section>OCA\User_SAML\Settings\Section</admin-section>
 	</settings>
+	<sabre>
+		<plugins>
+			<plugin>OCA\User_SAML\DavPlugin</plugin>
+		</plugins>
+	</sabre>
 </info>