feat: complete uninstall cleanup on server and local output

Remove binary, config, masq, system user, ufw rules, and apt packages from VPS; delete output/<server>/ by default and rebuild global index.html via localhost play.

playbook-uninstall.yml

@@ -5,3 +5,16 @@
   roles:
     - role: hysteria2
       tags: [uninstall]
+
+- name: Rebuild global output index after uninstall
+  hosts: localhost
+  connection: local
+  gather_facts: true
+  become: false
+  tags: [uninstall]
+  tasks:
+    - name: Regenerate output/index.html from remaining servers
+      ansible.builtin.include_role:
+        name: hysteria2
+        tasks_from: export_global.yml
+      when: hysteria2_uninstall_rebuild_global_index | default(true) | bool