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reduce ili9486 clock speed

ili9486 can't handle 64Mhz, drop to 48Mhz

Update direwatch.py missing _rgb_

lose old dependency information

remove alpha channel, compression level to 1

png compression level 1, remove alpha channel

Merge branch 'main' of https://github.com/craigerl/direwatch

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add ILI9486 display 320x480, dynamic font sizes, bigger icons

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Use J to measure font height, Q and J both dangle below baseline

move big callsign up a few pixels as to not crop Q and J tails

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