Add com.vscodium.codium #1433
The code on https://github.com/flathub/com.visualstudio.code.oss is a build from vscode sources and sadly I don't have enough spare time to figured how to resolve any compilation time bug also flathub/com.visualstudio.code.oss#46 is up to 7 month open.
A repository for this has been created: https://github.com/flathub/com.vscodium.codium
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