feat: add hysteria2 protocol dialer support

[mnixry]

This PR vendors the core components from the official Hysteria2 repository into project.

Rationale for Vendoring:

• There are only three publicly available implementations of Hysteria2:
  • sing-box: This implementation is heavily coupled with its own utility functions, making it less modular.
  • mihomo: This codebase mixes implementations of both Hysteria1 and Hysteria2 protocols. Since Hysteria1 has become a legacy protocol, it will not be addressed in this PR.
  • Re-implementing the protocol details from scratch is challenging and prone to introducing errors.

Request for Reviews and Comments:

As I am very new to Golang, any reviews or comments are welcome.

TODO:

• Add a license claim for the original repository.
• Implement the ability to choose a congestion control protocol (e.g., BBR/brutal), though it's unclear how to pass the bandwidth parameter into dialer.
• Reduce codebase size by reusing existing code (e.g., sharing congestion control algorithms code with TUIC). Alternatively, it might be better to leave the code as is to facilitate easier merging of upstream changes.

Related Issues:

• 支持 Hysteria1/2 协议 dae#450
• 也支持下Hysteria、Hysteria2协议呗 softwind#7

[mnixry]

I've manually tested this PR, and it appears to be functioning for dae. I believe it's now ready for review.

[xmapst]

太棒了 终于有望不用再开一个hysteria进程了

[mnixry]

This is my patch to reuse tuic code, could you please apply it?

@mzz2017 Thank you. The patch you provided has been applied in commit 8f1cb0a.

[xmapst]

还在进行中吗?

[mzz2017]

LGTM! Thanks for your contribution!

[mzz2017]

For better testing, I merged this PR first. Subsequent progress and updates can continue in the new PR.