inky: Add support for additional display models

[gsexton]

Change GPIO pins to gpioioctl compatible names.
Add support for Impression displays.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 21 lines in your changes missing coverage. Please review.

Project coverage is 0.0%. Comparing base (905e306) to head (ae4370b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
inky/main.go	0.0%	21 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.0%) is below the target coverage (60.0%). You can increase the patch coverage or adjust the target coverage.
❌ Your project status has failed because the head coverage (0.0%) is below the target coverage (60.0%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@         Coverage Diff         @@
##           main    #12   +/-   ##
===================================
  Coverage   0.0%   0.0%           
===================================
  Files        52     52           
  Lines      4541   4550    +9     
===================================
- Misses     4541   4550    +9     

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