Added the reference of the 'CGX' CLI to the README so people can easi…

[jeroenouw]

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[kylelobo]

Thanks for the PR. This project looks very useful and promising. However, I feel like it would fall under the subcategory of "Tools" in the Table of Contents.

Do you have any suggestions of how could I add it under "Tools"? Since "Tools" redirects to a Write The Docs link, the only way I can think of adding it under "Tools" is by adding it as a subpoint. However, I feel like that will disrupt the ToC structure.

[jeroenouw]

@kylelobo Thank you for your response, maybe an even better idea is to place it under templates as a subpoint called template generator: cgx?

[kylelobo]

Seems reasonable. Can you make the changes?

[jeroenouw]

@kylelobo I pushed the changes