chore: update README

[enocom]

This commit cleans up the project README and consolidates all additional
documentation into the docs folder.

Fixes #362.
Fixes #599.
Fixes #498.
Fixes #401.

[kurtisvg]

Can we make sure these issues are addressed as well: #498 #401

[enocom]

I've addressed almost all the comments and resolved #498 and #401.

Here's what's left:

• Add an example + context around Public vs Private IP, as well as an example that shows how to specify the bind interface.
• Add an example that mentions how to specify IP types (making sure to call out how access via Private IP works, and linking to the Cloud docs about it)
• Add a section here for using the Dial function (See #433) EDIT: I think we can skip this one until the new dialer goes out.