Adding basic 40 pin layout

[sundaram123krishnan]

for now implemented buttons, will make it to radio button

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 17%. Comparing base (50e0afc) to head (d932749).

Files	Patch %	Lines
src/piggui.rs	0%	39 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #17    +/-   ##
=====================================
- Coverage      31%   17%   -13%     
=====================================
  Files           2     2            
  Lines          43    80    +37     
=====================================
  Hits           13    13            
- Misses         30    67    +37     

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