FRLG Egg RNG Program

[theastrogoth]

This adds an RNG program for hatching eggs at the Four Island daycare.

It's a bit more complicated than the other RNG programs in a few ways:

• There are two different frames that need to be hit rather than one
  • This makes it necessary to save the game after (hopefully) hitting the first frame
  • I've tried to make it unlikely that the program saves and commits to a bad egg, but it's not totally guaranteed
• The target's IVs are influenced by the parents
• There are some frames that do not generate an egg, making calibration harder
• Ten Lines does not support searching for good frames for Egg RNG, and using PokeFinder is kind of a pain
  • I've mocked up a basic web app for searching for Held/Pickup frames, which might be helpful for eventual users: http://theastrogoth.github.io/frlg-egg-search

On the plus side, it makes it possible to obtain shiny Pokemon with any IVs and nature, regardless of your TID and SID, which isn't true of any Gift/Wild Pokemon.

There are also some small changes to things that are shared with other RNG programs. When this is ready, I'll open a separate PR with the tweaks that affect shared code. Done

[theastrogoth]

Changes made in shared code are handled by #1283

[theastrogoth]

After #1286, I think this is ready for a private beta!

[Mysticial]

This file is huge. If you want to break this up into smaller files, feel free to do that. Probably a lot of helper functions that can be extracted? Since I think we might have more egg routines like this in the future.

[theastrogoth]

I've tried to tidy things up a bit. Since this affected some other RNG programs, this has mostly been separated out into #1291

This file is still big after the reusable parts have been elsewhere, but hopefully a little bit more readable