Assert that Scoop is installed before use

roles/scoop/tasks/main.yaml

@@ -1,4 +1,14 @@
 ---
+- name: detect if scoop is installed
+  win_command: where.exe scoop
+  changed_when: false
+  failed_when: false
+  register: scoop_result
+
+- assert:
+    that: scoop_result.rc == 0
+    fail_msg: Scoop is not installed
+
 - name: add extras bucket
   community.windows.win_scoop_bucket:
     name: extras