[FEATURE] Add config option for custom name choices

[chaoticbear]

Proposal

The current plop generator uses standard naming conventions from atomic design as the name suggests.

In our workflow, we're using NextJS which includes a pages directory at the root of the project (which is not rename-able) used for page routes. To avoid confusion we wanted to modify that to page-components.

To do this we added an option to customize the atomic name choices. This has the added benefit of letting a group use atomic design principles while being creative with how what they're called.

Usage

The project defaults to using the original atomic names, and the config is not required to exist.

To customize the name choices, add the following option to the plopfile atomicGenerator config with whichever custom names you'd like to use:

choices: ['Atoms', 'Molecules', 'Organisms', 'PageComponents', 'Templates'],

Goal is to add an option to customize the name choices in the prompt and directories used.

[chaoticbear]

@ahoendgen let me know what you think of this PR. This and the others (#4 #5) have been really useful for our workflow and we hope they can help other people who use your tool. I'm happy to make any changes you need to these.