feat: add lambda http api streaming

[yotamishak]

solves #156

Summary

Adds LambdaHandler.streamFromHttpApi for streaming HttpApi responses through Lambda Function URLs with response streaming enabled.

Changes

• Add LambdaHandler.streamFromHttpApi
• Add lower-level LambdaHandler.httpApiStreamHandler
• Reuse request/header/cookie conversion between buffered and streaming HttpApi handlers
• Pipe Web Response.body into awslambda.HttpResponseStream
• Add README example showing:
  • handle for normal schema responses
  • handleRaw for streamed HttpServerResponse values
• Add unit test coverage for Lambda Function URL streaming behavior
• Add a minor changeset for @effect-aws/lambda

Validation

• pnpm --filter @effect-aws/lambda eslint
• pnpm --filter @effect-aws/lambda compile
• pnpm --filter @effect-aws/lambda test
• Deployed and validated an SST smoke example with progressive chunks over a Lambda Function URL

Notes

• reused type of ApiGatewayProxyV2 because it adheres to function url type of payload 2.0

Example

A standalone deployable SST example is available at:
https://github.com/yotamishak/effect-aws-lambda-streaming-example

[changeset-bot]

🦋 Changeset detected

Latest commit: 0664442

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@effect-aws/lambda	Minor

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[floydspace]

hi @yotamishak

good PR

I'm happy you understood the art...

I wanted to suggest some improvements, but it was a bit tricky, so it is good enough

[yotamishak]

@floydspace feel free to suggest
lets get this right

[arjunyel]

@yotamishak any chance you can add this to the beta branch? Thank you!

[floydspace]

@arjunyel I can do that, I noticed the normal release also failed.. gonna check it asap

[floydspace]

@arjunyel this should be in beta now too