implement dclogin scheme (#3541)

* start implementing dclogin scheme

* fix formatting

* add test for usename+extension@host cases

* add test with all advanced options

* add changelog

* jsonrpc api and regenerate node constants

* Update src/qr/dclogin_scheme.rs

Co-authored-by: Hocuri <hocuri@gmx.de>

* apply Hocuris comments from code review

* fix clippy

* Use .eq_ignore_ascii_case()

* rename internal function apply_from_login_qr
to configure_from_login_qr

* fix error message

* cargo fmt

* remove test todo comment

Co-authored-by: Hocuri <hocuri@gmx.de>

deltachat-jsonrpc/src/api/types/mod.rs

@@ -94,6 +94,9 @@ pub enum QrObject {
         invitenumber: String,
         authcode: String,
     },
+    Login {
+        address: String,
+    },
 }
 
 impl From<Qr> for QrObject {
@@ -224,6 +227,7 @@ impl From<Qr> for QrObject {
                     authcode,
                 }
             }
+            Qr::Login { address, .. } => QrObject::Login { address },
         }
     }
 }