[#20] include project config, Mailpit setup

[joshuapease]

Overview

• 20

I think we could unlock some cool super-powers by committing baseline project config YAML in our starter.

• Running ddev craft install will also auto-install all of the plugins (instead of that being a separate step after installing Craft.
• We can pre-configure mail to use STMP and route all messages through mailpit locally (prevents accidental emails to users)
  • Included in this PR
• We can configure default Volumes and S3 configs.
  • https://github.com/vigetlabs/craft-site-starter/issues/15
• We can include a starter page builder and blocks rather than rely on a plugin to import/export JSON versions of blocks.
  • https://github.com/vigetlabs/craft-site-starter/issues/26

What this PR does

• Include the default project config generated when running craft install
• Configures mail settings to use SMTP and Mailpit for local development
• Updates composer-scripts/post-create-project.php to replace any "starter" related text with the project specific text that the user is prompted with.

Testing steps

# Make an empty directory for the starter project
mkdir test-craft-starter

cd test-craft-starter

# composer create-project
docker run --rm -it -v "$PWD":/app -v ${COMPOSER_HOME:-$HOME/.composer}:/tmp composer create-project viget/craft-site-starter=dev-jp/20-include-project-config ./ --ignore-platform-reqs

# After the project has been scaffolded

ddev craft/install

ddev launch