feat: add new templates

Added new templates related to backup tasks

`rclone.conf.j2` - rclone.conf template to set up remotes for restic repos. these are setup specifically for gdrive with a private client id.

`restic-backup.service.j2` and `restic-prune.service.j2` are used to define daily backups and weekly prunes as systemd services respecfully.

roles/backup/templates/rclone.conf.j2

@@ -0,0 +1,11 @@
+{% for remote in rclone_remotes %}
+[{{ remote.remote_name }}]
+type = drive
+client_id = {{ remote.client_id }}
+client_secret = {{ remote.client_secret }}
+scope = drive
+token = {{ remote.client_auth_token }}
+team_drive = {{ remote.team_drive_id }}
+root_folder_id = 
+
+{% endfor %}

roles/backup/templates/restic-backup.service.j2

@@ -0,0 +1,16 @@
+[Unit]
+Description=Restic Backup: {{ backup_name }}
+After=network-online.target
+
+[Service]
+Type=oneshot
+User=root
+Environment=RESTIC_REPOSITORY={{ restic_repo_url }}
+Environment=RESTIC_PASSWORD_FILE={{ restic_password_file }}
+Environment=RCLONE_CONFIG={{ rclone_config_path }}
+
+# Back up the specified paths
+ExecStart=/usr/bin/restic backup {{ backup_paths | join(' ') }}
+
+# Forget/Prune policy
+ExecStartPost=/usr/bin/restic forget --keep-daily {{ keep_daily }} --keep-weekly {{ keep_weekly }}

roles/backup/templates/restic-prune.service.j2

@@ -0,0 +1,12 @@
+[Unit]
+Description=Restic Prune: {{ backup_name }}
+After=network-online.target
+
+[Service]
+Type=oneshot
+User=root
+Environment=RESTIC_REPOSITORY={{ restic_repo_url }}
+Environment=RESTIC_PASSWORD_FILE={{ restic_password_file }}
+Environment=RCLONE_CONFIG={{ rclone_config_path }}
+
+ExecStart=/usr/bin/restic prune