appdata: Update appdata

[ghost]

• Use appstreamcli to validate appdata
• Fix some appdata issues
• Mark the developer_name tag as untranslatable also deprecated
• Remove useless custom Purism tags
• Add vcs-browser and translate URLs
• Add newly added developer > name tag
• Remove duplicated translation tag

[vixalien]

Thanks as always Sabri! I really appreacite your work!

[ghost]

I tested using flatpak json file, adding the "run-tests" : true, string after the following lines.

before

"name": "sticky-notes",
"buildsystem": "meson",

after

"name": "sticky-notes",
"buildsystem": "meson",
"run-tests" : true,

result

[1/2] Running all tests.
1/3 Validate desktop file          OK              0.02s
2/3 Validate schema file           OK              0.01s
3/3 Validate appstream file        OK              0.02s

[vixalien]

Ah, I will need to add run-tests then..

[ghost]

Not exacly. It usefull for the devel json

[vixalien]

Yes, I meant I need to add it to the devel flatpak manifest