* feat(cf-workers): add RequestParts for ergonomic request extraction

Introduces RequestParts struct that extracts owned HTTP metadata from a
web_sys::Request and provides as_request_info() to borrow it for gateway
dispatch. Eliminates 8 lines of manual parsing boilerplate per handler.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* refactor(cf-workers): trim public exports to essential API surface

Reduce public exports from 8 to 2 (response_from_gateway, headermap_from_js).
Remove dead code (xml_response, s3_error_response) and make internal helpers
pub(crate).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* refactor(cf-workers): add WsHeaders newtype for ergonomic header conversion

Introduces WsHeaders wrapper around web_sys::Headers with From<&HeaderMap>,
working around orphan rule constraints. Replaces 4 manual header conversion
blocks in backend.rs and response.rs, and removes the now-unused headers_to_js.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* refactor(cf-workers): encapsulate JsBody with private field and accessor methods

Makes JsBody's inner Option<ReadableStream> private to prevent accidental
mutation. Adds JsBody::new() constructor and stream() accessor.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* refactor(cf-workers): replace response_from_gateway with GatewayResponseExt trait

Replaces the free function with an extension trait on GatewayResponse,
enabling method syntax: `result.into_web_sys()`. Improves discoverability
via IDE autocomplete on the GatewayResponse type.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: update crate-layout to reflect cf-workers ergonomic improvements

Documents RequestParts, GatewayResponseExt, JsBody, and WsHeaders in the
cf-workers crate description.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: add .worktrees to gitignore

* refactor: make Body an associated type on ProxyBackend (#38)

Replaces the generic Body parameter on forward() with an associated
type, eliminating runtime downcasts via Box<dyn Any>. Body type
mismatches are now caught at compile time.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat(cf-workers): add CORS utility and auto-decode request paths (#37)

- add_cors_headers() sets permissive CORS headers for browser-accessible
  S3-compatible read-only proxies
- RequestParts::from_web_sys() now percent-decodes the URL path
  automatically

These eliminate two common boilerplate patterns in consumer apps.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: add HandlerAction::response_headers_mut() for ergonomic header injection (#36)

Middleware that adds response headers (CORS, Server-Timing, etc.) no
longer needs to match on all three HandlerAction variants manually.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* refactor: use MaybeSend/MaybeSync on BucketRegistry and CredentialRegistry (#35)

This allows WASM implementations to use !Send types (like worker::Fetch
and the CF Cache API) directly, eliminating the need for spawn_local +
oneshot channel bridges.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: merge fix

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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>