Add repo add and repo show commands

gdn-cli/src/commands/repo.rs

@@ -0,0 +1,22 @@
+mod add;
+mod show;
+
+use clap::Parser;
+
+use crate::Environment;
+
+/// Perform repo operations.
+#[derive(Debug, Parser)]
+pub enum Command {
+    Show(show::Command),
+    Add(add::Command),
+}
+
+impl Command {
+    pub fn run(self, env: &Environment) -> anyhow::Result<()> {
+        match self {
+            Self::Show(command) => command.run(env),
+            Self::Add(command) => command.run(env),
+        }
+    }
+}