rtk-win: native Windows fork of rtk v0.43.0

[Asphalt9bla]

Rust-native ls/tree/wc/find, PowerShell cmdlet filters, winget filter, install.ps1, Windows benchmarks

Summary

Test plan

• cargo fmt --all && cargo clippy --all-targets && cargo test
• Manual testing: rtk <command> output inspected

Important: All PRs must target the develop branch (not master).
See CONTRIBUTING.md for details.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}