aws-lambda-nodejs: introduce `NodejsFunctionV2` to support Rolldown as a bundler

### Describe the feature

[Rolldown](https://github.com/rolldown/rolldown) is a Rust-based bundler that aims to provide API compatibility with Rollup and performance parity with esbuild.

On December 25, 2024, Rolldown [v1.0.0-beta.1](https://github.com/rolldown/rolldown/releases/tag/v1.0.0-beta.1) was officially released, marking a major milestone in its development. With its modern design and growing adoption, Rolldown is poised to become the next standard for bundling and is already set to replace both esbuild and Rollup in Vite.

### Use Case

In light of these advancements, adding support for Rolldown in the `aws-lambda-nodejs` module would provide future-proofing with a next-generation bundler aligned with modern frameworks, as well as improved performance through smaller bundle sizes and faster builds enabled by Rust-based optimizations.

### Proposed Solution

Monitor Rolldown's stability as it moves toward a production-ready release. Once stable, implement support for it with a new `NodejsFunctionV2` construct.

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### CDK version used

2.173.4

### Environment details (OS name and version, etc.)

Ubuntu 24.04.1

Start by reviewing the aws-lambda-nodejs module and its current bundler integration, then assess Rolldown's stability and API compatibility. Done means defining and implementing a production-ready NodejsFunctionV2 construct that supports Rolldown once it is stable.

Written by the indexing model from the issue text.