Support printing IDs and selecting by ID

[tmck-code]

Context

When using pokesay, it's possible to select a Pokemon's name and category, and then the final choice is made by randomly selecting between those.

This change gives each pokemon avatar a distinct ID so that an exact pokemon avatar can be selected

Command Line args

• print JSON of id -> name
• allow selection via id with -i

operation	screenshot
list IDs for a Pokémon (or all Pokémon with just -l
Get specific Pokémon via ID
display the ID in the info bar with -I