feat(network): expose saved WiFi networks in settings

[jbwfu]

Description

Added saved Wi-Fi management.

I'm unsure if it's necessary to increment the API version here.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that changes existing behavior)
• Refactor / internal cleanup
• Documentation
• Other

Related issues

Screenshots / video

Default folded:

After expansion:

Checklist

• My code follows the conventions in CONTRIBUTING.md
• I have tested my changes locally
• New user-facing strings are wrapped in I18n.tr() with translator context, reusing existing terms where possible
• Go changes: ran make fmt, added/updated tests, make test passes, and go mod tidy is clean
• QML changes: ran make lint-qml with no new warnings
• I have opened a corresponding pull request in dlx-docs to document any new behaviors: https://github.com/AvengeMedia/DankLinux-Docs

[jbwfu]

It was my oversight; I will fix it later.

[jbwfu]

This force push does not change any behavior. It only extracts the connection check into a local variable so golangci-lint --fix does not rewrite the boolean expression automatically.

CI failed because the remote check runs prek run --all-files, which checks the whole repository and applies auto-fixable lint changes. My local commit hook passed, but it did not run the same all-files check as CI, so it did not catch this rewrite before pushing.

[jbwfu]

Improved support for iwd network backend and updated API version from 25 to 26.