Add build instructions for CMake and fpm

[awvwgk]

Closes #123
Closes #122

[codecov]

Codecov Report

Merging #125 (2ab1517) into main (e027695) will not change coverage.
The diff coverage is n/a.

❗ Current head 2ab1517 differs from pull request most recent head 31e9902. Consider uploading reports for the commit 31e9902 to get more accurate results

@@           Coverage Diff           @@
##             main     #125   +/-   ##
=======================================
  Coverage   59.16%   59.16%           
=======================================
  Files          40       40           
  Lines        2946     2946           
  Branches      995      995           
=======================================
  Hits         1743     1743           
  Misses        642      642           
  Partials      561      561           

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