[Feature Request] Add new uncommon ext as a known ext (like .in but in fact it's a txt) from the app's ui

[15921483570]

Sometimes I need to create a different ext for the files to distinguish them from the others, but the glance cannot be used then.

e.g.: The ext of data files for the OI / algorithm competition would usually be .in and .out, or.in1, .in2..., but they are in fact .txt.

I want to register these exts as txt so that I can glance them as txt, it's much easier than to change and build the source files.

I think it will be a useful function, thanks for your help!

[chamburr]

It is not possible to change the extensions supported from the UI. However, I think .in and .out would be reasonable defaults. Do you want to add them through a pull request? Example: https://github.com/chamburr/glance/pull/36/files