Remove EXIF rotation from preview image and remove EXIF dependencies from frontend

[Coteh]

Closes #17.

Notes:

• Modern browsers appear to support EXIF orientation now, which means that rotating the image preview is not required anymore. (images are still rotated server-side, however)
• Bundle size has been reduced by ~26% (from 169.11 kB to 125.75 kB).
• Took GitHub Copilot for a test drive while working on this issue - it was able to write out two new image util functions on my behalf (readImage and setImageSrc) and also provided the suggestion to use !!plugin for the plugin filter in webpack.config.js.

Other Changes:

• Clean up onFileSelected function and split off the code related to upload preview element
• Remove Sentry webpack plugin when in development mode to speed up rebuild time
• Slightly increase opacity transition for image preview
• Change translation value for image preview to be based on percentages, which has slightly moved it down
• Add util methods for setting image src and reading image data, and remove all other image util frontend functions

[gitpod-io]

[codecov]

Codecov Report

Merging #326 (8c5611d) into development (86c8887) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development     #326   +/-   ##
============================================
  Coverage        64.40%   64.40%           
============================================
  Files               15       15           
  Lines             1194     1194           
============================================
  Hits               769      769           
  Misses             425      425           

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