Declare Flathub repo for installing runtimes without requiring interaction

Author: janopae

Makefile

@@ -28,8 +28,8 @@ flatpak-builder-tools/pip/flatpak-pip-generator:
 	pip3 install --user requirements-parser PyYAML
 
 pypi-dependencies.flatpak-manifest.yaml: requirements.txt flatpak-builder-tools/pip/flatpak-pip-generator
-	flatpak remote-add --user --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
-	flatpak install org.freedesktop.Sdk//23.08
+	yes | flatpak remote-add --user --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
+	flatpak install flathub org.freedesktop.Sdk//23.08
 	flatpak-builder-tools/pip/flatpak-pip-generator --runtime=org.freedesktop.Sdk//23.08 --requirements-file=requirements.txt attrdict3 --output pypi-dependencies.flatpak-manifest --yaml
 
 dist/repo: src bin names.txt.gz dict_en.dat.gz manual.html setup.py pypi-dependencies.flatpak-manifest.yaml Devel.flatpak-manifest.yml