support SSD1681 eink display in library#10

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pikot wants to merge 4 commits intoolikraus:masterfrom

Commits on Dec 3, 2021

first approach to ssd1681 driver support
pikot
committed

Commits on Jan 16, 2022

ssd1681 and partial update
pikot
committed

Commits on Apr 17, 2022

Merge branch 'olikraus:master' into master
pikot
authored

Commits on May 13, 2022

Merge branch 'olikraus:master' into master
pikot
authored