Setting path to streamlink's executable AppImage only works without filename extension

[SchimmelGelenk]

Checklist

• I'm reporting a problem with Chatterino
• I've verified that I'm running the most recent nightly build or stable release
• I've looked for my problem on the wiki
• I've searched the issues and pull requests for similar looking reports

Describe your issue

After an excruciating amount of time trying to get streamlink work I realized the problem as stated in the title. So setting custom streamlink path in Chatterino lead to behaviour:

First:
"/home/schim/AppImages/streamlink.AppImage" -> chatterino.streamlink: Got error code 1

Then renaming the AppImage:
"/home/schim/AppImages/streamlink" -> works as intended

Screenshots

No response

OS and Chatterino Version

Chatterino 2.4.6 (commit eb8c7f2 modified) built with Qt 6.5.3 Running on KDE Flatpak runtime, kernel: 6.6.6-76060606-generic, running from Flatpak

[SchimmelGelenk]

While this can be expected behaviour, it did not occur to me as Streamlink Twitch GUI recognizes the executable regardless of the filename extension. Maybe adding a note in above the custom path box would suffice as the user is not aware how Chatterino handles the executable

[pajlada]

The StreamLink errors/messaging can mention what the default binary path is, and what it expects the binary's name to be 👍 This would be a good first issue for someone looking to contribute

[pajlada]

I'd say this is resolved by the improved documentation in #5076