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-ffi/src/lot.rs

@@ -58,6 +58,7 @@ impl Lot {
                 Qr::WithdrawVerifyGroup { grpname, .. } => Some(grpname),
                 Qr::ReviveVerifyContact { .. } => None,
                 Qr::ReviveVerifyGroup { grpname, .. } => Some(grpname),
+                Qr::Login { address, .. } => Some(address),
             },
             Self::Error(err) => Some(err),
         }
@@ -108,6 +109,7 @@ impl Lot {
                 Qr::WithdrawVerifyGroup { .. } => LotState::QrWithdrawVerifyGroup,
                 Qr::ReviveVerifyContact { .. } => LotState::QrReviveVerifyContact,
                 Qr::ReviveVerifyGroup { .. } => LotState::QrReviveVerifyGroup,
+                Qr::Login { .. } => LotState::QrLogin,
             },
             Self::Error(_err) => LotState::QrError,
         }
@@ -131,6 +133,7 @@ impl Lot {
                 Qr::WithdrawVerifyGroup { .. } => Default::default(),
                 Qr::ReviveVerifyContact { contact_id, .. } => contact_id.to_u32(),
                 Qr::ReviveVerifyGroup { .. } => Default::default(),
+                Qr::Login { .. } => Default::default(),
             },
             Self::Error(_) => Default::default(),
         }
@@ -195,6 +198,9 @@ pub enum LotState {
     /// text1=groupname
     QrReviveVerifyGroup = 512,
 
+    /// text1=email_address
+    QrLogin = 520,
+
     // Message States
     MsgInFresh = 10,
     MsgInNoticed = 13,