Try build Warehouse to flatpak

[NobeliY]

• [+] I have read the README.md document
• [+] I am using the latest version of Warehouse
• I am using the Flatpak package of Warehouse
• [+] I have not found any other opened issues on the same topic

Describe the issue in detail

We are trying to assemble in a warehouse and only then we collect, only then we receive:

Traceback (most recent call last):
File "/app/bin/warehouse", line 46, in
from Warehouse import main
File "/app/share/warehouse/Warehouse/main.py", line 27, in
gi.require_version("Flatpak", "1.0")
File "/usr/lib/python3.12/site-packages/gi/init.py", line 122, in require_version
raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace Flatpak not available

Run flatpak run io.github.flattool.Warehouse in a terminal and if applicable, show any output

[heliguy4599]

I've had this happen to me before. I've gotten around it by using flatpak-builder from Flathub: org.flatpak.Builder. I've found distro packages of flatpak-builder dislike the libflatpak stuff in Warehouse