README rework

[Shillaker]

Note, this PR is best reviewed by looking at the final version of the docs on the branch.

What's changed?

• Move all non-essential docs to docs folder
• Show examples of both function and container configuration in README
• Show configuration in configuration file format, not bullet points in text
• Remove docs/README.md
• Fixed version of prettier used in Linting (3.0.0 is latest and finds issues all over codebase)

Why is this necessary?

• README was long, verbose and inaccurate in parts
• README made it difficult to differentiate between function and container config options
• Putting the config file in text bullet points was hard to translate to YAML. Easier to copy-paste from a YAML format
• docs/README.md was almost all duplicated information
• A single large markdown file is difficult to browse from a terminal, separate files in a docs folder are easier

[asuri0n]

good updates 👍