Updating and improving the documentation

[ampersarnie]

Documentation is not complete and requires some improvement in some areas. I'll be using this issue to track any documentation ready for the release of v1.0.0.

• Setting the WP locale configuration (see: Make wordpress locale configurable #56).
• Setting up seeder clean routines (see: Adds seeder clean routines #70)
  • Extend the code examples and API.
  • CLI arguments and commands.
• Setting the PHP version (see: Allow php version to be configurable via cypress.json #69)
• Manual user switching. (see: Allow for manual user switching. #62)
• Exposing the db port configuration (see: Add configurable exposed db port #60)
• Examples page
• Setting the php memory limit configuration (see: Add php memory limit to config #78).
• Corrections
• Plugins path typo (see: Path in installation in wiki is "plugin" instead of "plugins" #86)