Add validation to project name

gitlab_project does not validate the name on plan, but will fail on apply with:

Error: PUT https://workshop.cloud.gov/api/v4/projects/98: 400 {message: {name: [can contain only letters, digits, emoji, '_', '.', '+', dashes, or spaces. It must start with a letter, digit, emoji, or '_'.]}}

Add validation to the project module