MassInstallAction: Install the GitHubActionsCI workflow on this repository

[christopher-dG]

This pull request sets up the GitHubActionsCI workflow on this repository. cc: @christopher-dG

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@2e9acc1). Click here to learn what that means.
The diff coverage is 66.66%.

@@            Coverage Diff            @@
##             master      #33   +/-   ##
=========================================
  Coverage          ?   91.33%           
=========================================
  Files             ?        2           
  Lines             ?      254           
  Branches          ?        0           
=========================================
  Hits              ?      232           
  Misses            ?       22           
  Partials          ?        0           

Impacted Files	Coverage Δ
src/DASSL.jl	91.73% <33.33%> (ø)
src/common.jl	83.33% <100.00%> (ø)

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