Feature: Documentation refactor

[seangwright]

Motivation

• Update docs to more closely match the repo-template
• Add migration path diagram images
• Add VS Code editor settings and recommended extensions
• Disable dotnet format in CI pipeline
  • We can re-enable once all WIP branches have been merged and we have a single "format" PR
• Update .editorconfig to match other integration repos

Checklist

• Code follows coding conventions held in this repo
• Automated tests have been added
• Tests are passing
• Docs have been updated (if applicable)
• Temporary settings (e.g. variables used during development and testing) have been reverted to defaults

How to test

No functional changes have been made.

The README and other markdown can be previewed here.

[tkrch]

@seangwright i will perform solution reformat with dotnet format in PR #208 after updating editor config from https://github.com/Kentico/repo-template. Do You agree?

[seangwright]

@tkrch yup! After this PR is merged into master, you can merge master in and pick up the .editorconfig changes.