feat: content types

[dotkas]

No description provided.

[Copilot]

Pull request overview

This PR expands the server generator’s request/response body handling from JSON-only to a single selected content type per operation/response (JSON, form, or text), and documents the supported/unsupported behaviors.

Changes:

• Add ir::Body / BodyKind to carry both the Rust type and selected wire-format for request/response bodies.
• Update lowering to select a body content type by priority (JSON > form > text) and to error on unsupported-only request bodies.
• Update axum emission to use the appropriate extractor/response wrapper (axum::Json, axum::Form, or String) and add new fixtures/snapshots for text/form/json-charset cases.

Reviewed changes

Copilot reviewed 12 out of 15 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
README.md	Documents content-type selection behavior and new unsupported cases.
crates/oapi-codegen/src/ir.rs	Introduces Body/BodyKind and threads them through operation/response IR.
crates/oapi-codegen/src/lower/paths.rs	Implements content-type selection and lowers request/response bodies into Body.
crates/oapi-codegen/src/emit/axum.rs	Emits axum extractors/response terms based on BodyKind.
crates/oapi-codegen/tests/coverage.rs	Registers new supported/unsupported server fixtures for coverage enforcement.
crates/oapi-codegen/tests/generated_compiles.rs	Includes new generated snapshots and adds compile-time wiring tests for new fixtures.
crates/oapi-codegen/tests/generated/server_text_body.rs	Snapshot output for text/plain request/response bodies.
crates/oapi-codegen/tests/generated/server_form_body.rs	Snapshot output for application/x-www-form-urlencoded request bodies.
crates/oapi-codegen/tests/generated/server_json_charset.rs	Snapshot output for JSON request bodies with ; charset=utf-8 media type.
crates/oapi-codegen/tests/fixtures/server_text_body.yaml	New fixture for text/plain body handling.
crates/oapi-codegen/tests/fixtures/server_form_body.yaml	New fixture for form body handling.
crates/oapi-codegen/tests/fixtures/server_json_charset.yaml	New fixture for JSON media-type parameter handling.
crates/oapi-codegen/tests/fixtures/server_unsupported_only_binary_body.yaml	New negative fixture for unsupported-only request body types.
crates/oapi-codegen/tests/fixtures/server_unsupported_text_non_string_body.yaml	New negative fixture for non-string text/plain schema.
crates/oapi-codegen/tests/fixtures/server_unsupported_form_scalar_body.yaml	New negative fixture for non-$ref form schema.

[alchemax-housekeeper]

🎉 This PR is included in version 1.0.0-dev.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[alchemax-housekeeper]

🎉 This PR is included in version 1.0.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀