Cleaning up scripts and deps + introducing prettier

Also introducing lint-staged and husky.

All changes beside package.json and package-lock.json are mandated by prettier.

Uses same approach as SolidOS/chat-pane#19

Author: megoth

README.md

@@ -13,4 +13,3 @@ the syntax is checked before they save it back.
 Once selected this pane as a view of a file, then the pen icon allows to switch to editing mode, and the check mark button allows the file to be saved back.
 
 Editing can be aborted by the cancel(X) button.
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