Summary by cubic

Adds clarifying docs to AxiosRequestTransformer<D> and AxiosResponseTransformer<T> explaining the transform pipeline and what the generics represent. No runtime or type API changes; comments only in index.d.ts and index.d.cts.

Description

• Summary of changes: Added JSDoc to AxiosRequestTransformer and AxiosResponseTransformer to describe left-fold pipeline behavior and scope of D/T generics; updated both index.d.ts and index.d.cts.
• Reasoning: Clarifies how data flows through transform arrays and when generic types apply, reducing confusion after the recent type change.
• Additional context: Guidance notes recommend typing D only for the first transformer and noting that later stages may receive serialized forms.

Docs

• Suggest adding a short note in /docs/ under request/response transforms explaining:
  • Transforms run as a left-fold pipeline.
  • D/T describe the input to the first transformer only.
  • Later transformers may receive serialized data (string, Buffer, FormData, etc.).
  • Example showing a single typed request transformer vs. an array with mixed outputs.

Testing

• No tests added or modified. This is a comments-only update to type definition files; no behavior or type signatures changed, so tests are not required.

Semantic version impact

• Patch: documentation-only change within .d.ts/.d.cts comments, no runtime or public type API changes.

^{Written for commit c3f187e. Summary will update on new commits. Review in cubic}