Eject and Sample command refactor

• SampleCommands.php extracted from WillowCommands.php as a standalone task command.
• eject command destroys SampleCommands.php

Bug fixes

• Fixed 🔧 a bug when calling run() which actually was calling itself causing a stack overflow 💣 error
• Removed 💥 unused import in Willow.php
• Fixed 🔧 eject command
• Discovered and fixed 🔨 a side-effect in RoboBase.php with scoped constants set to protected instead of private.
• Fixed 🔧 processValidation() in WriteValidatorBase.php removed final from processValidation() that is actually expected to be overridden.
• Removed 8.x in template -- this may be added as a feature in the future but isn't currently used.

Major overhaul of Willow initial release of 3.0

• Code generator simplified
• Willow is a one-way framework -- meaning that code generation is destructive and will overwrite existing code when re-run
• Added a code sniffer PHPCS to standardize coding style

Fix issues with DI / Eloquent / vlucas/phpdotenv missed a commit

Added a missing commit for _env.php

Fix issues with DI / Eloquent / vlucas/phpdotenv

• Thunked "vlucas/phpdotenv": "^v4.2.0"
• config/db.php uses getenv() in all instances.

Cleanup and upgrade

• Cleanup Willow Commands
• Update README.md
• Version upgrade for Robo and dbal

Upgrade dependency vlucas/phpdotenv to 5.3

Updated package.json:

"vlucas/phpdotenv": "^5.3"

Capsule and Container are protected static properties

Minor change to how $capsule and $container are maintained

Update package dependencies

package.json updated to latest dependencies

Add ResponseCode constants

Use ResponseBody::HTTP_code to be more descriptive