Optimize images in assets

[mbeacom]

Description

The goal of this PR is to optimize all images in app/assets/* and provide a quick stopgap bash script scripts/compress_images.bash - (make compress-images) to optimize/compress/squash all svg, png, and jpg files throughout the assets directory until we implement some runner to take over during bundling.

Checklist

• linter status: 100% pass
• changes don't break existing behavior
• commit message follows commit guidelines

Affected core subsystem(s)

static

Refers/Fixes

Ref #608

[codecov]

Codecov Report

Merging #724 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #724   +/-   ##
=======================================
  Coverage   34.79%   34.79%           
=======================================
  Files          99       99           
  Lines        5536     5536           
  Branches      642      642           
=======================================
  Hits         1926     1926           
  Misses       3536     3536           
  Partials       74       74

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[mbeacom]

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