Prettier

[reichhartd]

This PR is best reviewed by commits. The first commit is the initial setup. In the second, only Prettier was run over all files.

Prettier

Initial setup details:

• Best practice: Fixed version of Prettier, because even a different patch version formats the code differently (Prettier install).
• Prettier command was created to run over all files that Prettier supports. In addition to TypeScript files, Markdown, among others, is also available.
• Package pretty-quick added, which runs over the staged files before the commit.

Apart from that, Prettier was also run over all files.

[Flyrell]

If you ever have time, would you be able to fix the conflicts here @reichhartd ? Thanks.

[reichhartd]

@Flyrell Fixed all conflicts

[Flyrell]

Thank you for your contribution @reichhartd