Ansible: download vim-plug from GitHub

Use get_url to download vim-plug/plug.vim from GitHub.
Create a new eryn_vim_plug_tag variable to control which tag to download.

Ansible/roles/eryn/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+eryn_vim_plug_tag: 0.14.0

Ansible/roles/eryn/tasks/neovim.yml

@@ -4,6 +4,12 @@
     name: neovim
     state: present
 
+- name: "neovim : Download vim-plug from GitHub"
+  ansible.builtin.get_url:
+    url: "https://raw.githubusercontent.com/junegunn/vim-plug/{{ eryn_vim_plug_tag }}/plug.vim"
+    dest: "{{ ansible_local.xdg.data_home }}/nvim/site/autoload/plug.vim"
+    mode: "0644"
+
 - name: "neovim : Symlink config"
   ansible.builtin.include_tasks: symlink_dotfile_directory.yml
   vars: