Feat: add list_parts function

[glegendr]

add list_parts function as described here
https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListParts.html

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This change is 

[durch]

@glegendr thank you for the contribution, I wonder if you could add a test, along the lines of those for methods, maybe reuse one of the multipart upload test, or just add an assertion in there

[Copilot]

Pull Request Overview

This PR adds a list_parts function to the S3 client that implements the AWS S3 ListParts API for retrieving information about parts uploaded for a specific multipart upload.

• Added ListPartsResult struct to deserialize S3 ListParts API responses
• Added ListParts command variant with support for pagination parameters
• Implemented both async and sync versions of the list_parts method

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
s3/src/serde_types.rs	Added ListPartsResult struct and made Part struct deserializable
s3/src/command.rs	Added ListParts command variant and integrated it into command handling
s3/src/request/request_trait.rs	Added URL parameter handling for ListParts command
s3/src/bucket.rs	Implemented list_parts method with async and sync variants

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