[System Updates Manager] Add adapters for pipx, xbps, and gearlever

[YoshiWalsh]

Plugin

• Id: tordex/system-updater
• New plugin
• Update to an existing plugin (version bumped in plugin.toml)

What it does

This PR adds three new adapters:

• pipx, for managing Python applications
• Gear Lever, for managing AppImages
• XBPS, for managing system packages in Void Linux

External dependencies

jq, grep, sed, and coreutils.

Testing

I have tried checking for updates, installing an update to one package, and installing all updates for each of the three adapters.

• Tested on Niri
• Tested on Hyprland
• Tested on Sway
• Tested on another compositor:
• Noctalia version tested against: v5.0.0-beta.9
• Plugin API level: 20

Screenshots / Videos

No significant changes

Checklist

Ready-for-review requirement: Every box in this section must be checked. If any statement is not true, keep the
pull request as Draft. An explanation does not replace a required check.

• The directory name matches the part of id after the / in plugin.toml exactly.
• It ships plugin.toml, README.md, thumbnail.webp, and translations/en.json.
• README.md follows the
  README template, documents
  every entry id and dependency, and includes exact panel IPC commands and launcher prefixes where applicable.
• I created thumbnail.webp with the thumbnail generator.
• version follows semver and is bumped in this PR; plugin_api is the oldest API level this plugin requires.
• Every non-English translation in this PR uses a locale supported by Noctalia core, and I can read, write, and
  understand that language well enough to review and maintain it (no unreviewed machine/LLM translations).
• I did not edit catalog.toml; CI generates it.
• This PR touches exactly one plugin directory.

Code review attestation

Plugins run as trusted, unsandboxed Luau in the user's session. Confirm:
Ready-for-review requirement: Every attestation below must be checked.

• The code is readable and not obfuscated, minified, or generated.
• It does not download and execute remote code.
• Every network call, filesystem write, and spawned process is something the description above accounts for.
• I have the right to publish this code under the license declared in plugin.toml.

[github-actions]

CC @tordex

[YoshiWalsh]

Converted back to draft because I think I need to do further testing on the XBPS adapter.

[tordex]

Awesome! New adapters are welcome!

One note about xbps adapter. You should use pkexec instead of sudo. sudo requests password in terminal, but plugin doesn't support this. So updating process will stuck on this. pkexec requests password via GUI and user have a chance to enter it.

[YoshiWalsh]

That makes sense! When I tested it, somehow it worked with sudo... once. I think I may have run some other command with sudo before launching noctalia, and I tested it during the sudo timeout. I converted this back to draft when I realised I couldn't get the XBPS stuff to work a second time.

When I'm back at my PC I'll switch to using pkexec and test it again.