Update to a supported runtime and drop org.kde.*

Update to a supported runtime

```
Info: runtime org.kde.Platform branch 5.14 is end-of-life, with reason:
The KDE 5.14 runtime is no longer supported and does not receive security updates. We strongly recommend migrating to a supported runtime.
Info: applications using this runtime:
io.github.qnapi
```

This is no longer required with any supported runtimes, the issue was fixed in Qt

https://docs.flatpak.org/en/latest/desktop-integration.html#statusnotifier

> Most implementations of StatusNotifer have dropped this requirement

https://github.com/flathub/flatpak-builder-lint/issues/ 66#issuecomment-1386033025

Start by locating the Flatpak manifest for io.github.qnapi and identify the org.kde.Platform 5.14 runtime and any org.kde.* integration entry. Read the linked Flatpak desktop-integration guidance and Qt context, then confirm the manifest uses a supported runtime and no longer requires those entries.

Written by the indexing model from the issue text.