Add a MIME type and a desktop file to open recordings

[nobodyinperson]

This Merge Request introduces an application/x-asciicast MIME-Type. This enables adding a .desktop-file to open asciinema .cast-files from within a file manager. By double-clicking a .cast-file, the default terminal will open and play the recording.

The web browser will also allow opening a downloaded .cast-file directly like this:

[ku1ik]

Hey, thanks! This seems useful.

The tool is named "asciinema" but the actual file format is called "asciicast", so we've been using application/x-asciicast MIME type in asciinema, see here:

• https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v2.md#asciicast-file-format-version-2
• https://github.com/search?q=repo%3Aasciinema%2Fasciinema-server%20application%2Fx-asciicast&type=code

Other than that it looks good!

[nobodyinperson]

I renamed the mimetype to x-asciicast and for me it works as expected. ✅