refactor(dart): new dart implementation

[chaokunyang]

Why?

Current Dart implementation is messy and not aligned with other languages

What does this PR do?

• Rewrite the whole dart implementation
• Keep api aligned with other languages
• Add dart benchmarks

Related issues

#1017

AI Contribution Checklist

• Substantial AI assistance was used in this PR: yes / no
• If yes, I included a completed AI Contribution Checklist in this PR description and the required AI Usage Disclosure.
• If yes, my PR description includes the required ai_review summary and screenshot evidence of the final clean AI review results from both fresh reviewers on the current PR diff or current HEAD after the latest code changes.

Does this PR introduce any user-facing change?

• Does this PR introduce any public API change?
• Does this PR introduce any binary protocol compatibility change?

Benchmark

[ayush00git]

Hii @chaokunyang
are their any architectural changes happening in the runtimes?

[chaokunyang]

Hii @chaokunyang are their any architectural changes happening in the runtimes?

It's mostly api refactor to align with other languages. We are preparing for fory 1.0.0 release, I don't want to introduce breaking changes in future

[ayush00git]

It's mostly api refactor to align with other languages. We are preparing for fory 1.0.0 release, I don't want to introduce breaking changes in future

are there any public pre-release docs for that update?

[chaokunyang]

For dart, we will write docs based on new api. and for javascript, we also need new docs. for other languages, we need more checks on existing api and docs

[yash-agarwa-l]

Hi @chaokunyang, since this rewrites the Dart API I've been working with. Is there anything I can help with here, testing, docs, or any follow-up tasks once this is complete? Happy to pick up whatever's useful.

[chaokunyang]

Hi @chaokunyang, since this rewrites the Dart API I've been working with. Is there anything I can help with here, testing, docs, or any follow-up tasks once this is complete? Happy to pick up whatever's useful.

The performance can be optimized further, especially for struct.