Code Cleaning and Linters

[FlorianK13]

Linting

• Add prettier as dev dependency
• Save all linter config in .prettierrc.yml
• Create new npm command: npm run format will run the prettier linter on all files in the repo
• Done this once to make all files linter conform
• Created a linting github action that runs for PRs on main

Deleting unused dependencies and functions

• Identified dependency paco as unused
• Found several functions and variables that were never used and deleted them. I used eslint to find those variables.

Changing CRLF to LF probably explains the huge size of this PR.

[FlorianK13]

@khdlr real Review will not work here, as almost all files changed. Are you happy with all the changes as described above?