Feature: Don't add unused imports to the generated file(s)

[KaHLK]

What are the steps to reproduce this issue?

1. Use the split, tags, or tags-split mode
2. Define a custom formData override.
3. Run orval

What happens?

The generated files all include an import of the custom formData override.

What were you expecting to happen?

The formData override to only be included in files where it is needed.

What versions are you using?

Operating System: macOS 14.2.1
Package Version: 6.23.0

[KaHLK]

I'm more than prepared to tackle this myself, if you deem it relevant for the project.
Only thing I need before moving forward, is any input on the approach to get it implemented. As in: Are there any information that would make it clean to do.
I have taken a quick stab at it in my own project and made a jank approach to it:
(packages/core/src/writers/split-tags-mode.ts:L115)

if (formData && formData.some(f => implementation.includes(f.name))) {
    implementationData += generateMutatorImports({
        mutators: formData,
        oneMore: true
    });
}

I don't really see this as a real solution, just needed to throw something quick together for testing on my local project.

[melloware]

Sure submit a PR!

[lukaw3d]

If it adds much complexity:

• TypeScript compilation removes unused imports unless you use preserveValueImports
• Linters can already auto-fix this (and you can trigger them in afterAllFilesWrite)