Add editorconfig file and cleanup devicon.json bad formatting

[BenSouchet]

Intro

This PR is based on this discussion #1337 , the idea was, as a first step, to add EditorConfig to the project, and I also fix bad formatting on the JSON file.

What is EditorConfig ?

EditorConfig helps maintain consistent coding styles for multiple developers working on the same project across various editors and IDEs. The EditorConfig project consists of a file format for defining coding styles and a collection of text editor plugins that enable editors to read the file format and adhere to defined styles. EditorConfig files are easily readable and they work nicely with version control systems.

What is done by EditorConfig

When you work on a file, and for example press the tab key , you will automatically insert the correct indent type and length, for Devicon it's space of length 4.
When you save the file, the charset defined will be used, whitespace at end of lines (if enable) will be removed. An empty new line will be created at the end of the file if not already present.

What isn't done

EditorConfig is not a linter, so the file won't be re-ordered, existing tab keys won't be replaced by spaces, or miss-aligned indentation won't be fixed.

EditorConfig is a list of parameters what will be read and used by your current IDE to format the text you are adding, and format the ouput file settings (charset, insert_final_newline).

Conclusion

EditorConfig is one step in the right direction to unified project files formatting

This does not replace a linter, for JSON file spectral could be a good choice.
Github Hook can be added to lint the JSON file:
https://meta.stoplight.io/docs/spectral/ecaa0fd8a950d-workflows#git-hooks

Since the "cleaning" of devicon.json file can lead to merge conflicts It's maybe a good idea to handle the open pull requests first, then when there is few pull requests still open, this PR can be merge to develop.

[Snailedlt]

Nice! This is much needed!
Could only dind three lines that had bad indentation still.

Thanks for making this PR 🙇

[Snailedlt]

Looks good!
Thanks for your contribution, and a much needed feature 🚀

[Panquesito7]

I believe we're missing an endline in here.

Suggested change

	trim_trailing_whitespace = false
	trim_trailing_whitespace = false

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 Summary: 🛠️ This code needs a fix  |  Tags: Inefficient

[Snailedlt]

The irony 😅
Did the exact same thing in another peoject, judt with prettier

[Snailedlt]

@BenSouchet I think all the PRs that were made before this one (except for stale ones) have been merges now. So feel free to rebase on develop, make the necessary changes and tag me and panquesito when you're done, so we can give a final review before mergin into develop :)

[BenSouchet]

@Snailedlt Hi, due to too much conflicts and issues I decided to create a new branch and so a new PR, check #1364