Add option to hide/unhide tame

[themrrobert]

Description:

• Adds option to hide/unhide your tame. (from /tames list)
• This is because you can easily acquire a large-ish number of tames trying to hatch several for good stats and/or shiny tames.

Changes:

• Adds hidden column on Tame table
• Adds /tames hide command to toggle/set the hidden value
• Adds hidden option to /tames list command to include the hidden tames in case you do want to see the big graphic :)

Other checks:

• I have tested all my changes thoroughly.

[gc]

Not sure this is the best way to solve this issue of too many tames (manually hiding each one, which might be a lot). We could do pages.