Shellcheck everything (#10730)

* Shellcheck all shell scripts

* Implement Shellcheck's recommendations

* Shellcheck the distribution-specific files

* Include the distro scripts to trigger action

* Fix array usage (hopefully)

* Use single-quote string

TIL: single quote string in yaml treats everything as literal, but
double quote allows backslash escaping.

* Make all cmake commands use set+-x dance and fix macos getopts line

Make Claude happy

getopts has colon after a command which takes an argument

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Co-authored-by: SoftFever <softfeverever@gmail.com>

scripts/run_gettext.sh

@@ -31,9 +31,7 @@ do
             msgmerge -N -o "$dir/OrcaSlicer_${lang}.po" "$dir/OrcaSlicer_${lang}.po" "$pot_file"
         fi
         mkdir -p "resources/i18n/${lang}"
-        msgfmt --check-format -o "resources/i18n/${lang}/OrcaSlicer.mo" "$dir/OrcaSlicer_${lang}.po"
-        # Check the exit status of the msgfmt command
-        if [ $? -ne 0 ]; then
+        if ! msgfmt --check-format -o "resources/i18n/${lang}/OrcaSlicer.mo" "$dir/OrcaSlicer_${lang}.po"; then
             echo "Error encountered with msgfmt command for language ${lang}."
             exit 1  # Exit the script with an error status
         fi