Add a method to filter the spell lists by school

[MythicalRollers]

I think it would be useful for players to see the following additional info when looking at the spells on the Class Spell List. School, Casting action, and spell component flags. Helpful for like Arcane Rogues getting to add enchantment or illusion spells. Or the Wizard who wants all the Evocation spells. Similar to the picture I posted in #10, thought it does not need to be as detailed. Just the basics I listed.

[krbz999]

This seems to be more-so a request for a filter for a user to search for spells of specific schools within one class' spell list. I think I will reframe it as such rather than create a new hbs template for the spell's "details" methods.