Add support for SeaORM's --model-extra-derives in db entities command

[its-grape-juice]

Feature Request

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

Currently unable to add custom derives like clickhouse::Row to generated database entities in Loco because the --model-extra-derives option from SeaORM's CLI is not exposed through Loco's db entities command.

Describe the solution you'd like

Add support for SeaORM's --model-extra-derives option in Loco's db entities command. This would allow users to specify additional derive macros for the generated model structs. For example:

loco db entities --model-extra-derives "clickhouse::Row"

Describe alternatives you've considered

Manually adding derives to generated files (not maintainable, gets overwritten on regeneration)

[wdcodecn]

[wdcodecn]

in my usecase

cargo loco db entities

sea-orm-cli generate entity --with-serde both --model-extra-derives 'sea_orm_crud_macros::SeaOrmCrud' --output-dir src/models/_entities --database-url postgres://postgres:1234qwer@localhost:5432/loco

sed -i 's/impl ActiveModelBehavior for ActiveModel {}/\/\/impl ActiveModelBehavior for ActiveModel {}/g' src/models/_entities/*