Create Slackbot Command for Adding LinkedIn URL

[refcell]

This would allow users to run a command in slack and input their LinkedIn URL.
On the backend, our slack bot would parse the URL and attempt to scrape LinkedIn for the user's profile picture.
If the user didn't enter any info like first name and last name, this can also be scraped from LinkedIn.

Scraper implementation built out by @chloetanlimco allows us to do:

const profileScraper = await scrapedin({ email: process.env.LINKEDIN, password: process.env.LINKEDINPASS });
const profile = await profileScraper(<whatever url the user gives us>);

[MaxLeiter]

why? @chloetanlimco has built a linkedin URL form for the profile setup