feat(cli): add basic bash completion for portprotonqt

Signed-off-by: Boris Yumankulov <boria138@altlinux.org>

build-aux/fedora-git.spec

@@ -65,5 +65,6 @@ cp -r build-aux/share %{buildroot}/usr/
 %{_datadir}/icons/hicolor/scalable/apps/ru.linux_gaming.PortProtonQt.svg
 %{_metainfodir}/ru.linux_gaming.PortProtonQt.metainfo.xml
 %{_datadir}/applications/ru.linux_gaming.PortProtonQt.desktop
+%{bash_completions_dir}/portprotonqt
 
 %changelog

build-aux/fedora.spec

@@ -64,5 +64,6 @@ cp -r build-aux/share %{buildroot}/usr/
 %{_datadir}/icons/hicolor/scalable/apps/ru.linux_gaming.PortProtonQt.svg
 %{_metainfodir}/ru.linux_gaming.PortProtonQt.metainfo.xml
 %{_datadir}/applications/ru.linux_gaming.PortProtonQt.desktop
+%{bash_completions_dir}/portprotonqt
 
 %changelog

build-aux/share/bash-completion/completions/portprotonqt

@@ -0,0 +1,19 @@
+_portprotonqt() {
+    local cur prev
+    _init_completion || return
+
+    case $prev in
+        --help|-h)
+            return
+            ;;
+    esac
+
+    if [[ "$cur" == -* ]]; then
+        COMPREPLY=( $( compgen -W '--fullscreen --session' -- "$cur" ) )
+        return 0
+    fi
+
+    return 0
+}
+
+complete -F _portprotonqt portprotonqt