Package as Flatpak for elementary OS 6

[danirabbit]

As you might have heard, AppCenter is going Flatpak! For elementary OS 6, we will not longer be accepting Debian packaging, so your app will need to be updated.

We have documentation on our developer guide for writing your Flatpak manifest here: https://docs.elementary.io/develop/writing-apps/our-first-app/packaging#flatpak-manifest

Also, in case you missed it, elementary OS 6 beta 2 is now available. This is a great time to get your app packaged up as Flatpak and test that everything is working before the final release. AppCenter submission for OS 6 will be open soon, so don't delay :)

[dar5hak]

@RonnyDo I have written a Flatpak manifest for ColorPicker in the linked pull request. If you have some time, please review and merge it, then release a new version and let Daniel know, so that he can add it to AppCenter for elementary OS 6.0.

[eurruby]

@dar5hak I think we can say that it is abandonware. Could you make a fork and post it on the AppCenter? I find this app useful and very cool.

[dar5hak]

@eurruby Some of my friends are on it.

https://github.com/watsonprojects/ColorPicker

[janxkoci]

In the meantime I found this app to be an "okay" substitute. Less elegant, but at least it's GTK and not Electron nonsense (and installs with flatpak instead of snap 👍 ).