feat: plugin image slider

[alexbarnsley]

Summary

• Change to use plugin image thumbnails
• Add modal to view plugin thumbnails

Todo in the future:

• Slider component to reduce code smell between the 2 components

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #1783 into develop will decrease coverage by 0.17%.
The diff coverage is 13.88%.

@@             Coverage Diff             @@
##           develop    #1783      +/-   ##
===========================================
- Coverage    59.89%   59.71%   -0.18%     
===========================================
  Files          366      367       +1     
  Lines         9146     9178      +32     
  Branches      1848     1854       +6     
===========================================
+ Hits          5478     5481       +3     
- Misses        3486     3515      +29     
  Partials       182      182              

Impacted Files	Coverage Δ
...inManager/PluginManagerModals/PluginImageModal.vue	7.14% <0.00%> (ø)

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