fix(type): Add missing OptimizationSplitChunksNameFunction param

[Lemonexe]

Summary

Add missing argument to type declaration of OptimizationSplitChunksNameFunction.

Notes

ℹ️ I have found this only empirically while migrating a webpack project to Rspack, but I have no experience with Rspack codebase, so it'd be appreciated if reviewers verified if the type declaration is appropriate.

The following excerpt of rspack.config.ts works correctly, but yields TS error (it is used to group shared chunks, e.g. shared/main-app~subprocess-app.js):

    optimization: {
        splitChunks: {
            chunks: 'all',
            // Rspack type declaration is missing the 2nd argument
            // @ts-expect-error Target signature provides too few arguments. Expected 2 or more, but got 1.
            name: (_module, chunks: Chunk[]) => {
                return chunks.length === 1
                    ? chunks[0].name
                    : `shared/${chunks.map((item: any) => item.name.split('/').pop()).join('~')}`;
            },
        },
    },

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[chenjiahan]

Thanks for your contribution! Can you update the related files too?

• Zod schema:

  rspack/packages/rspack/src/config/zod.ts

  Line 1176 in 75f0d20

  // FIXME: z.array(z.instanceof(Chunk)).optional(), z.string()

• Run pnpm run api-extractor:local to update api.md

[inottn]

I don't know why the module parameter was optional in the previous definition. We can also add the missing cacheGroupKey parameter.

Suggested change

	export type OptimizationSplitChunksNameFunction = (
	module?: Module,
	chunks?: Chunk[]
	) => unknown;
	export type OptimizationSplitChunksNameFunction = (
	module: Module,
	chunks: Chunk[],
	cacheGroupKey: string
	) => string | undefined;

[Lemonexe]

Done as suggested 🙂
As @chenjiahan pointed out, I also updated the zod schema, which I hadn't known about.
I ran npm run api-extractor:local, but that produced a lot of diffs, idk if that seems right.