Add gemini-cli role

roles/gemini-cli/tasks/main.yaml

@@ -0,0 +1,14 @@
+---
+- name: install homebrew package
+  when: ansible_os_family == 'Darwin'
+  homebrew:
+    state: latest
+    name: gemini-cli
+
+- name: install npm package
+  when: ansible_os_family != 'Darwin'
+  become: true
+  community.general.npm:
+    name: '@google/gemini-cli'
+    state: latest
+    global: true