Update README, split into docs folder

[brainless]

Lets refresh our README and create easier to follow documentation:

• Create a docs/ folder to save multiple Markdown files to split our project documentation
• Update README to make it minimal
• Keep project features and links to getting started in README
• Links to getting started should take user to new Markdown files in docs/
• Separate document should exist get started for each major OS with sections for SmartCrawler, WebDriver and how to find further information by searching the web if needed
• A separate document for current CLI options of SmartCrawler - this is agnostic of OSes and linked to main README