generate a sample etch yaml in new env generation

src/subcommand/env.rs

@@ -1,4 +1,4 @@
-use {super::*, colored::Colorize, std::net::TcpListener};
+use {super::*, crate::wallet::batch, colored::Colorize, std::net::TcpListener};
 
 struct KillOnDrop(process::Child);
 
@@ -64,6 +64,32 @@ rpcport={bitcoind_port}
       ),
     )?;
 
+    fs::write(absolute.join("inscription.txt"), "FOO")?;
+
+    let yaml = serde_yaml::to_string(&batch::File {
+      etching: Some(batch::Etching {
+        divisibility: 0,
+        rune: "FOO".parse::<SpacedRune>().unwrap(),
+        supply: "2000".parse().unwrap(),
+        premine: "1000".parse().unwrap(),
+        symbol: '¢',
+        terms: Some(batch::Terms {
+          amount: "1000".parse().unwrap(),
+          cap: 1,
+          ..default()
+        }),
+        turbo: false,
+      }),
+      inscriptions: vec![batch::Entry {
+        file: Some("env/inscription.txt".into()),
+        ..default()
+      }],
+      ..default()
+    })
+    .unwrap();
+
+    fs::write(absolute.join("batch.yaml"), yaml)?;
+
     let _bitcoind = KillOnDrop(
       Command::new("bitcoind")
         .arg(format!("-conf={}", absolute.join("bitcoin.conf").display()))