Optimize all docs/ images

[nucliweb]

Summary

I know that the plugins optimize the images in the build process, but we can optimize lossless all images into the docs folder: screenshots, avatars, gif animations, etc...

This optimizes too the build time because the images are smaller

Basic example

I have the images optimized in perf/images-optimization, the commit include 672 images 😱

I used ImageOptim to optimize them.

Ressult

This is the docs folder size:

Before
258.981.060 bytes (261,7 MB on disk) for 1.516 items

After
196.442.901 bytes (199,2 MB on disk) for 1.516 items

Motivation

I 💜 Image Optimization 🏞
And with this action, we can reduce 62 MB the repo size with the same images quality 😊

So...

If you agree, I will send a PR to start the revision process.

[horacioh]

ping @LekoArts @m-allanson @sidharthachatterjee :)
this would be great for the translation repos too 👍

[nucliweb]

Although I would love to send a PR like this to the Gatsby's repo 😊.

I have been thinking of a better and more automated solution. I think it would be easier and will help future image optimizations implement ImgBot.

[LekoArts]

Hey, thanks for the issue. I'll mark this as a duplicate of #13699

Important note: Changing images without rewriting history (like mentioned in the linked issue) hugely increases the Git history.