Trade: Overhaul for features and fixes. Bump to 1.4

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See the commit logs, most of the detail is there, but this essentially:

• Improves trade logic handling (which happened to fix #20)
• Adds patch list support bidirectionally (which fixes #18)
• Flipper receives traded Pokemon, and can modify Pokemon, and can easily trade back and forth (fixes #19)
• Isolates Trade's scope
• Simplifies trade/link state handling
• Tries to document the trade protocol
• Cleans up TRADING animations
• Reduces time spend in ISR by enabling interrupt on both edges and handling data clocking there
• No longer allows numbers in Pokemon and Trainer names (not allowed in-game)
• Fixes FAP icon to be 1bpp
• Cleans up stale comments / marks some comments at not critical TODOs
• Handful of spelling corrections through a few files

Bumps changelog and application.fam to 1.4