Generator: eslint support for code format

[blackfalcon]

Is your feature request related to a problem? Please describe.

Too much code is submitted that does not conform to a standard format.

Describe the solution you'd like

https://eslint.org/docs/rules/indent

Exit criteria

The solution will stop a commit if the submitted code contains syntax that does not meet the standard.

[blackfalcon]

This issue was addressed with 58da5ce

The update will require patches to all custom elements.