Replace Evince with Papers

[ryonakano]

Fixes #98

Based on https://github.com/flathub/org.gnome.Papers

TODO

• Use released version of Flatpak platform instead of daily → Fixed with Flatpak platform 8.2
  • Papers requires gtk4 >= 4.17.1 and 8.1 is now based on GNOME runtime 48 which comes with gtk4 4.18.4
  • However, latest 8.1 runtime comes with gtk4 4.16.12 for some reason
  • Using daily for now as testing at the moment
• Document how to update generated-sources.json
• EOL Evince (see Replace Evince with Papers #99 (comment))

[danirabbit]

@ryonakano for EOLing Evince, I suppose we could add a json to appcenter-reviews with the EOL info?

[danirabbit]

• Missing show/hide sidebar icon (will be fixed with new granite release I think)
• no padding in the sidebar
• Zoom controls are pretty much invisible

[ryonakano]

@danirabbit We don't publish Evince via the appcenter-review repository so I'm not sure if that work. I think adding end-of-life and end-of-life-rebase inputs to the Daploy stage of the merge workflow whould work here:

evince/.github/workflows/merge.yml

Lines 44 to 49 in ecdbe81

	- name: Deploy
	uses: flatpak/flatpak-github-actions/flat-manager@v6.5
	with:
	repository: appcenter
	flat-manager-url: https://flatpak-api.elementary.io
	token: ${{ secrets.FLAT_MANAGER_TOKEN }}

[ryonakano]

@danirabbit What do you think about creating a new repository for Papers instead of merging this branch into main of this repository?

Reasons:

• I guess we need to publish Papers first then publish the last update of Evince with the EOL info if we follow the way I mentioned above
• Evince is also published to OS 7.x as Flatpak so we need to create a separate branch for OS 7.x if we continue using this repository and update the recipe on Launchpad too if we want to release this change only to OS 8.x
• This repository is named evince at the moment so we need to rename it to papers or pdf-viewer (like the browser of Web) if we continue to use this repository with Papers
• We also need to work on the deb-packaging branch to rename the package name from org.gnome.evince to org.gnome.papers

[danirabbit]

@ryonakano yeah im not opposed to that.

I think once we EOL evince that AppCenter will make Papers its upgrade path on OS 7 regardless

[danirabbit]

• Need to add a patch to rename style.css to Application.css so Granite will load it. Fixes a bunch of missing styles: https://gitlab.gnome.org/GNOME/papers/-/blob/main/shell/resources/papers.gresource.xml.in#L8