[DRAFT] New libNode API

[vmoroz]

This PR implements C# bindings for the new libNode API defined in PR nodejs/node#54660.
More specifically, it wraps the code from this branch:
https://github.com/vmoroz/node/commits/libnode/v20.x/ since the PR is still in progress.

I am also working on the internal Microsoft ADO pipeline to ship the libnode as a Nuget package.
My hope is that it must be ready soon - I am waiting for some approvals.

This PR is a DRAFT. I may still need to do some changes to the code.
The changes may also happen to the new libnode C-API as I am learning about some of its limitations in this PR.
The goal of the initial DRAFT PR is to get the initial feedback on the overall approach for binding the new APIs.
Some of unit tests are still failing. I am going to fix them in the next few days.

Copilot reviewed 6 out of 20 changed files in this pull request and generated no suggestions.

Files not reviewed (14)

• src/NodeApi/Runtime/NodejsPlatform.cs: Evaluated as low risk
• src/NodeApi.DotNetHost/JSRuntimeContextExtensions.cs: Evaluated as low risk
• bench/Benchmarks.cs: Evaluated as low risk
• src/NodeApi/Runtime/NodejsRuntime.Embedding.cs: Evaluated as low risk
• src/NodeApi/Runtime/TracingJSRuntime.cs: Evaluated as low risk
• src/NodeApi/Runtime/NodeJSRuntime.cs: Evaluated as low risk
• src/NodeApi/Runtime/JSRuntime.cs: Evaluated as low risk
• test/GCTests.cs: Evaluated as low risk
• test/NodejsEmbeddingTests.cs: Evaluated as low risk
• src/NodeApi/Runtime/NodejsEmbeddingThreadRuntime.cs: Evaluated as low risk
• src/NodeApi/NodeApiStatusExtensions.cs: Evaluated as low risk
• src/NodeApi/Runtime/NodejsEmbeddingPlatform.cs: Evaluated as low risk
• src/NodeApi/Runtime/NodejsEmbedding.cs: Evaluated as low risk
• src/NodeApi/Runtime/NodejsEmbeddingRuntimeSettings.cs: Evaluated as low risk

Comments skipped due to low confidence (1)

src/NodeApi/Runtime/NodejsEmbeddingModuleInfo.cs:12

• The property name NodeApiVersion should be renamed to NodeApiVersion to maintain consistency with the naming conventions used elsewhere in the codebase.

public int? NodeApiVersion { get; set; }