[NF] Provides the ixp-manager:setup-wizard artisan command for easier creation of the initial database objects - closes #889

This command provides the means to easily create the initial database objects, required to start using IXP Manager.
It also supports command-line options to provide the values from automated scripts.

In addition to the above, I have:

• ensured all relevant template output is escaped to avoid XSS attached with <?= $t->ee( $data ) ?> or equivalent.
• ensured appropriate checks against user privilege / resources accessed
• API calls (particular for add/edit/delete/toggle) are not implemented with GET and use CSRF tokens to avoid CSRF attacks