feat: implement qr code for base node (#3977)

Description
---

Create a QR code for the link `tari://base_nodes/add&name=NODE_ID&peer=PEER`
Where PEER is a formatted string: PublicKey::PublicAddress

Motivation and Context
---

Users should be able easy to add a base node just scanning the QR printed in base node console.

How Has This Been Tested?
---

Manually, running the `tari_base_node` and scanning the QR using the Aurora app.
The base node should be listed if everything is correct.

.gitignore

@@ -53,4 +53,7 @@ buildtools/Output/
 
 # Ignore coverage profiling artifacts
 *.profraw
-/report/
+/report/
+
+# Ignore local history in Visual Studio Code
+.lh

applications/tari_base_node/Cargo.toml

@@ -33,6 +33,7 @@ crossterm = { version = "0.23.1", features = ["event-stream"] }
 derive_more = "0.99.17"
 either = "1.6.1"
 futures = { version = "^0.3.16", default-features = false, features = ["alloc"] }
+qrcode = { version = "0.12" }
 log = { version = "0.4.8", features = ["std"] }
 log-mdc = "0.1.0"
 num_cpus = "1"

applications/tari_base_node/src/commands/command/whoami.rs

@@ -23,6 +23,8 @@
 use anyhow::Error;
 use async_trait::async_trait;
 use clap::Parser;
+use qrcode::{render::unicode, QrCode};
+use tari_utilities::hex::Hex;
 
 use super::{CommandContext, HandleCommand};
 
@@ -42,6 +44,28 @@ impl CommandContext {
     /// Function to process the whoami command
     pub fn whoami(&self) -> Result<(), Error> {
         println!("{}", self.base_node_identity);
+        let peer = format!(
+            "{}::{}",
+            self.base_node_identity.public_key().to_hex(),
+            self.base_node_identity.public_address()
+        );
+        let network = self.config.network;
+        let qr_link = format!(
+            "tari://{}/base_nodes/add?name={}&peer={}",
+            network,
+            self.base_node_identity.node_id(),
+            peer
+        );
+        let code = QrCode::new(qr_link).unwrap();
+        let image = code
+            .render::<unicode::Dense1x2>()
+            .dark_color(unicode::Dense1x2::Dark)
+            .light_color(unicode::Dense1x2::Light)
+            .build()
+            .lines()
+            .skip(1)
+            .fold("".to_string(), |acc, l| format!("{}{}\n", acc, l));
+        println!("{}", image);
         Ok(())
     }
 }