Png support#95

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bri3d wants to merge 7 commits intomainfrom

Commits on Dec 11, 2022

add libspng 0.7.3
bri3d
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Commits on Dec 12, 2022

working PNG support
bri3d
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cleanup
bri3d
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Commits on Dec 14, 2022

split font code into own file
bri3d
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Commits on Dec 15, 2022

Commits on Dec 28, 2022

swap ipk to contain png
bri3d
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