Update @typescript-eslint/prefer-nullish-coalescing to error instead of warning

[mmilardic]

Issues

• I have checked existing issues and there are no existing ones with the same request.

Feature description

Prefer using nullish coalescing operator (??) instead of a logical or (||), as it is a safer operator @typescript-eslint/prefer-nullish-coalescing

This rule could be set to produce an error to provide consistency in the code. In the connectivity platform, there is a large amount where '| |' is used, and this rule currently gives only a warning.