Add spell animation demo to inside_perimeter by Groundskeeper

[nmadadair]

For the future: as the player continues to collect spells, it would be great to add demos of the spells in use by the player with each addition.

[MarvelProgramming]

The spell animation is now used when hiding the bramble leading into the catacombs, as well as when unlocking the gates leading to the pledge scroll that's inside the catacombs. Is this what you meant, or was there something else you had in mind?

[nmadadair]

In inside_perimeter the player "learns" the Vanishing Spell (used to disappear the brambles) by talking to the Groundskeeper -- but the Groundskeeper merely says "Here's the spell." It could be cool to see a demo of the player using the spell immediately after speaking with the Groundskeeper, as if they were testing it out.

We can implement this in the future, though! It shouldn't get in the way of deploying this week. I just wanted to capture the idea here.