Add Xray Decky plugin

[VadimOnix]

Add Xray Decky to Plugin Store

Xray Decky is a VPN & proxy client for Steam Deck. It supports VLESS (REALITY,
XTLS-Vision), VMess, Trojan, Shadowsocks (incl. 2022 ciphers), Hysteria2 and
TUIC via two swappable cores XTLS/Xray-core
and SagerNet/sing-box, downloaded on
demand, plus a user-owned SOCKS5 mode. It adds TUN mode for system-wide
VPN-style coverage in Gaming Mode, a kill switch, subscription support with a
managed server list, live traffic stats, and a phone-friendly web admin panel
(QR-code import) for headless setup. No comparable VLESS/VMess/Trojan/
Shadowsocks/Hysteria2/TUIC proxy client currently exists in this store; the
closest plugin by name (tailscale-control) is a Tailscale mesh-VPN
controller, a different protocol family and use case.

Repo: https://github.com/VadimOnix/xray-decky
Release pinned: v2.3.2

Task Checklist

Developer

• I am the original author or an authorized maintainer of this plugin.
• I have abided by the licenses of the libraries I am utilizing, including attaching license notices where appropriate.
• Generative AI was NOT used to write a majority of the code I am submitting.

Plugin

• I have verified that my plugin works properly on the Stable and Beta update channels of SteamOS.
• I have verified my plugin is unique or provides more/alternative functionality to a plugin already on the store.

Backend

• No: I am using a custom backend other than Python.
• No: I am using a tool or software from a 3rd party FOSS project that does not have it's dependencies statically linked.
• Yes: I am using a custom binary that has all of it's dependencies statically linked.

Community

Testing reports I left on two other plugin PRs, as per the Community checklist:

1. Add Achievement Companion (#1035)
2. Add Backlog Manager (#1097)

• I have tested and left feedback on two other pull requests for new or updating plugins.
• I have commented links to my testing report in this PR.

Testing

• Tested by a third party on SteamOS Stable or Beta update channel.

[github-actions]

Issues Found

No issues with your PR description were found.

Next Steps

1. If we found any issues above, please edit your pull request description to resolve them and leave a comment saying you've done so.
2. For the quickest review, please see the Community section of the pull request template for how you can help other developers.
3. Once your description is correct, a maintainer will review your pull request as soon as possible.

Thank you for your contribution! If you need any help, please reach out on our Discord server. ❤️

[AAGaming00]

please explain why required checklist items are not met

[VadimOnix]

please explain why required checklist items are not met

I didn't check the box for AI assistance because the plugin was developed using an Anthropic frontier model (Claude Fable 5). What I did was review the code at every phase and test it on a real device.

I use this model, with a specific harness, to boost code quality every day in my job on high-load production systems. I'm confident in the plugin and can walk through the logic of any module if need.

[AAGaming00]

Reread the plugin submission rules and/or the PR checklist.