Add support for mysql backup and restore

[vishalanarase]

❯ ./civo --config staging.civo.json db bk ls psql
Scheduled backup
+-------------+---------------+------------+-----------+-------------+------------------+
| Database ID | Database Name | Software   | Schedule  | Backup Name | Backup           |
+-------------+---------------+------------+-----------+-------------+------------------+
| f41a3f      | psql          | PostgreSQL | 0 0 0 * * | update-test | 20240131-000009F |
+-------------+---------------+------------+-----------+-------------+------------------+
Manual backups
+-------------+---------------+------------+------------------+
| Database ID | Database Name | Software   | Backup           |
+-------------+---------------+------------+------------------+
| f41a3f      | psql          | PostgreSQL | 20240129-092223F |
+-------------+---------------+------------+------------------+
| f41a3f      | psql          | PostgreSQL | 20240129-093432F |
+-------------+---------------+------------+------------------+
| f41a3f      | psql          | PostgreSQL | 20240129-095942F |
+-------------+---------------+------------+------------------+
  cli   mysql-manual-backup-restore !9                                                                                                  3s  02:08:58 PM
❯ ./civo --config staging.civo.json db bk ls mysql
Manual backups
+-------------+---------------+-----------+---------------+----------+--------+
| Database ID | Database Name | Backup ID | Backup Name   | Software | Status |
+-------------+---------------+-----------+---------------+----------+--------+
|      599730 | mysql         | 2daa05    | mysql-backup2 | MySQL    | FAILED |
+-------------+---------------+-----------+---------------+----------+--------+
|      599730 | mysql         | a2c199    | mysql-backup  | MySQL    | READY  |
+-------------+---------------+-----------+---------------+----------+--------+

[RealHarshThakur]

I think it might be worth updating README with some basic steps around creating and restoring backups