[WIP] Convert to Gradle build

[MrCreosote]

Based on Mystic Learnings taken from age old previous work and AJ's PR: #676

[codecov]

Codecov Report

Merging #716 (ddaf6e4) into develop (59b87e4) will decrease coverage by 87.67%.
The diff coverage is n/a.

❗ Current head ddaf6e4 differs from pull request most recent head 87c2853. Consider uploading reports for the commit 87c2853 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             develop   #716       +/-   ##
============================================
- Coverage      87.66%      0   -87.67%     
============================================
  Files            228      0      -228     
  Lines          17648      0    -17648     
  Branches        2573      0     -2573     
============================================
- Hits           15471      0    -15471     
+ Misses          1714      0     -1714     
+ Partials         463      0      -463