refactor: move doctor command

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/cuddle-please-commands/src/doctor_command.rs

@@ -0,0 +1,26 @@
+use cuddle_please_misc::DynUi;
+
+pub struct DoctorCommandHandler {
+    ui: DynUi,
+}
+
+impl DoctorCommandHandler {
+    pub fn new(ui: DynUi) -> Self {
+        Self { ui }
+    }
+
+    pub fn execute(&self) -> anyhow::Result<()> {
+        match std::process::Command::new("git").arg("-v").output() {
+            Ok(o) => {
+                let stdout = std::str::from_utf8(&o.stdout).unwrap_or("");
+                self.ui.write_str_ln(&format!("OK: {}", stdout));
+            }
+            Err(e) => {
+                self.ui
+                    .write_str_ln(&format!("WARNING: git is not installed: {}", e));
+            }
+        }
+
+        Ok(())
+    }
+}