Populate README with scope and maintenance status

[taiidani]

What Is Changing

Updating the README with additional documentation covering this project's current maintenance status and scope.

Fixes #45

[codecov]

Codecov Report

Merging #49 (715c85c) into main (3eac3f7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #49   +/-   ##
=======================================
  Coverage   80.82%   80.82%           
=======================================
  Files          17       17           
  Lines        1158     1158           
=======================================
  Hits          936      936           
  Misses        173      173           
  Partials       49       49           

Flag	Coverage Δ
acceptance	80.82% <ø> (ø)
unit	54.40% <ø> (ø)

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