feat: add ignoreForeignOnInputModel config to support include foreignIds in the generated input model

[yeliex]

This pull request introduces a new configuration option to control the generation of foreign key fields in input models, enhancing flexibility when generating model schemas. The primary change is the addition and integration of the ignoreForeignOnInputModel option.

Configuration enhancements:

• Added the ignoreForeignOnInputModel boolean option to the configSchema in src/config.ts, allowing users to prevent foreign key fields from being generated in input models.

Input model generation logic:

• Updated the stringifyPlain function in src/generators/plain.ts to respect the new ignoreForeignOnInputModel setting, so foreign key fields are omitted from input models when the option is enabled.

[m1212e]

Hey, thanks for your contribution, I will release a new version shortly!