feat(deltachat-repl): built-in QR code printer

Print QR codes with Rust code
instead of depending on external `qrencode`.

deltachat-repl/Cargo.toml

@@ -11,6 +11,7 @@ deltachat = { workspace = true, features = ["internals"]}
 dirs = "5"
 log = { workspace = true }
 nu-ansi-term = { workspace = true }
+qr2term = "0.3.3"
 rusqlite = { workspace = true }
 rustyline = "14"
 tokio = { workspace = true, features = ["fs", "rt-multi-thread", "macros"] }