Not using ` mod.rs` as the entry point of the generated entities

Discussed in https://github.com/SeaQL/sea-orm/discussions/2559

^{Originally posted by nyc4m April 12, 2025}
Hey there 👋

When generating entities, I noticed that the output code is using the "old" convention for modules, which is to output the source files as the following:

sea-orm-cli generate entity --database-url <DB_URL> --output-dir ./src/entities

# Resulting module structure
./src/entities
    /entities
        mod.rs
        foo.rs
        bar.rs
        prelude.rs

I'd rather use the "new" convention as described here. This would result in the following file structure:

sea-orm-cli generate entity --database-url <DB_URL> --output-dir ./src/entities

# Resulting module structure
./src/entities/
    entities.rs
    entities/
        foo.rs
        bar.rs
        prelude.rs

Is there anyway I can achieve this with the current CLI ?

Start with the sea-orm-cli generate entity command and trace how --output-dir determines the generated module structure. Compare the current mod.rs layout with Rust's newer module-source convention; done means generation produces the requested entities.rs entry point and nested entity files, with relevant coverage added if the command has tests.