feat(ui/MSALoginDialog): use libqrencode for qr codes

`qrcodegen` isn't available in most repositories, package discovery
scripts for it are maintained in a different repository, and they are
bugged for Windows at least. This basically forces us into vendoring it,
which isn't cool; libqrencode seems like viable alternative used by many
more apps

Signed-off-by: Seth Flynn <getchoo@tuta.io>

nix/unwrapped.nix

@@ -9,8 +9,8 @@
   jdk17,
   kdePackages,
   libnbtplusplus,
-  qrcodegenerator,
   ninja,
+  qrencode,
   self,
   stripJavaArchivesHook,
   tomlplusplus,
@@ -63,9 +63,6 @@ stdenv.mkDerivation {
   postUnpack = ''
     rm -rf source/libraries/libnbtplusplus
     ln -s ${libnbtplusplus} source/libraries/libnbtplusplus
-
-    rm -rf source/libraries/qrcodegenerator
-    ln -s ${qrcodegenerator} source/libraries/qrcodegenerator
   '';
 
   nativeBuildInputs = [
@@ -81,6 +78,7 @@ stdenv.mkDerivation {
     kdePackages.qtbase
     kdePackages.qtnetworkauth
     kdePackages.quazip
+    qrencode
     tomlplusplus
     zlib
   ]