more park event types, with categories for strength, intellect, and balanced

[BenMakesGames]

we have to be careful about creating new park event types, because if a particular type ends up unpopular in the player base, then people who don't know that might sign their pet up for it, and get stuck waiting for other pets to show up.

with that in mind:

1. create three categories of pet events: competitions of intellect, competitions of strength, and competitions of everything (paralleling that pets choose mind-over-matter, matter-over-mind, or balanced)
2. players register pets for one of those three categories (instead of the three specific event types now)
3. we make as many new event types as we want, within these categories

the game code already has placeholders for:

• Capture the Flag
• Sepak Takraw
• Badminton
• Pole Vaulting

PsyPets also had the following events:

• legally-distinct Dance Dance Revolution
• legally-distinct Iron Chef
• archery
• tug-of-war
• others I'm probably forgetting

the above lean pretty physical; some other competitions could be:

• trivia
• legally-distinct Taskmaster
• e-sports