add prettier for auto formatting (#231)

* [Prettier] Add "prettier"

Makes the formatting of the code consistent.
By using the eslint-plugin-prettier formatting issues will be highlighted as a lint error.
These errors will be auto fixed by running "lint --fix" (which can be done automatically on file save)

* [Prettier] Add "prettier" - Fix formatting

src/components/atoms/ThreeStateCheckboxInput.tsx

@@ -11,19 +11,11 @@ import React from 'react';
 import ThreeStateCheckbox, { ThreeStateCheckboxProps } from 'components/atoms/ThreeStateCheckbox';
 
 interface IProps extends ThreeStateCheckboxProps {
-    label?: string
+    label?: string;
 }
 
-const ThreeStateCheckboxInput: React.FC<IProps> = ({
-    label, sx, ...rest
-}) => (
-    <FormControlLabel
-        control={(
-            <ThreeStateCheckbox {...rest} />
-        )}
-        label={label}
-        sx={sx}
-    />
+const ThreeStateCheckboxInput: React.FC<IProps> = ({ label, sx, ...rest }) => (
+    <FormControlLabel control={<ThreeStateCheckbox {...rest} />} label={label} sx={sx} />
 );
 
 export default ThreeStateCheckboxInput;