Setup Husky and Prettier

[arturovt]

I din't run prettier on workspace files. Maybe you @dhilt would want to re-visit Prettier rules.

[dhilt]

@arturovt We are in 1 step from merging this PR, but I have a problem when trying to format the source code. I use the following script

    "format": "prettier --write \"scroller/**/*.ts\" \"demo/**/*.{ts,html,css,json}\" \"tests/**/*.{ts,css,json}\"",

and get the following error

✖ npm run lint:

D:\dev\dhilt\arturovt\ngx-ui-scroll\demo\app\demos.ts
  13:1  error  This line has a length of 130. Maximum allowed is 120  max-len

May I ask you to have a look, fix this last issue, run the above script (there will be more than 100 files changed) and commit the result?