Add gitignore support

[cidrblock]

• Add a gitignore file to the playbook and collection project
• Add ability to have per-resource template vars in a __meta__.yml file, this was necessary b/c the gitignore for the playbook and collection projects are different
• Add ability to pre-template resource specific vars before templating the files
• Refactor the copy container code into a dataclass
• Resources is now a list for multiple resources to be copied
• Only the scaffolded playbook adjacent project and requirements file are kept in the playbook adjacent collections directory