[ADDED] Loader when loading pictures

[MCoder86A]

Resolves #254

Here is a video

https://user-images.githubusercontent.com/56883128/209425713-dfcf3e19-253e-455c-8115-77115b1d6f99.mp4

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Name	Status	Preview	Updated
dynamic-portfolio	✅ Ready (Inspect)	Visit Preview	Dec 24, 2022 at 7:22AM (UTC)

[MCoder86A]

Dynamic-Portfolio_showdemo.webm