feat: remove localization type option

[dlockhart]

Now that LocalizationStaticMixin is gone, this removes it from the npm init generator.

I also decided that choosing to enable localization in the first place implied that you wanted Serge support. Seems silly not to.

[ghost]

:tada: This PR is included in version 2.6.0 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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