fix: create type import when generating types (#698)

[cplanson]

Description

When generating translation types file, use import type instead of import to prevent compiler errors when importsNotUsedAsValues or verbatimModuleSyntax flags are enabled.

Linked Issues

#698

Additional context

[coveralls]

coverage: 90.917% (+0.09%) from 90.829%
when pulling 63d9b0d on cplanson:fix/generate-type-import
into 85cbbfc on toonvanstrijp:main.