Add CLI/TOML tooling similar to laravel blueprint

[zenlex]

• Map out which traits/utilities are fixed vs which should be configurable without code changes
• Implement macros to generate more of the boilerplate from TOML configs
• Add CLI tooling to generate and wipe from draft config files
• Allow model definition via config files using macros / templates (decide on source code gen vs compiler macros - weigh pro/con)
• Generate database call boilerplate from model config files
• Add support for Diesel or other ORM in addition to sqlx