CI: Add action for pulling new translations (#4911)

* Update and rename translations.yml to translations-push.yml

* Rename update_translations.sh to update_translation_source_strings.sh

* Update and rename update_translations_template.md to update_translation_source_strings_template.md

* Add translations-pull.yml

* Update config

* Update desktop-lint.yml

* Update desktop-build.yml

* correct env var naming

* names

.ci/update_translation_source_strings.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# ci script to update translation files
+# usage:
+# $0 cockatrice/cockatrice_en@source.ts cockatrice/src common
+# or
+# FILE="cockatrice/cockatrice_en@source.ts"
+# DIRS="cockatrice/src common"
+# $0
+# note: directories can't contain spaces
+
+# check parameters
+if [[ ! $FILE ]]; then
+  FILE="$1"
+  shift
+fi
+if [[ ! $FILE ]]; then
+  echo "no output file selected" >&2
+  exit 2;
+fi
+if [[ ! $DIRS ]]; then
+  DIRS="$*"
+fi
+if [[ ! $DIRS ]]; then
+  echo "no source directories selected to translate" >&2
+  exit 2;
+fi
+if [[ ! -e $FILE ]]; then
+  echo "output file does not exist at: $FILE" >&2
+  exit 3;
+fi
+
+# print version
+if ! lupdate -version; then
+  echo "failed to run lupdate" >&2
+  exit 4;
+fi
+
+# run lupdate, duplicating the output in stderr and saving it
+# for convenience we ignore that $DIRS will be split on spaces 
+# shellcheck disable=SC2086
+if ! got="$(lupdate $DIRS -ts "$FILE" | tee /dev/stderr)"; then
+  echo "failed to update $FILE with $DIRS" >&2
+  exit 4;
+fi
+
+# trim output
+output="${got##*(}" # trim everything before last (
+output="${output%%)*}" # trim everything after first )
+if [[ $output == $got ]]; then
+  echo "could not parse generated output" >&2
+  exit 4;
+fi
+
+# write output to ci environment file
+echo "output=$output" >> $GITHUB_OUTPUT