Preview of Catalan translation (#1091)

This is now based on 
microbit-foundation/pyright@3cf8ae0
and 
microbit-foundation/micropython-microbit-stubs@901a1ff

Assuming there are no issues with the translation in context I have no objection to this going live quite quickly.

Author: microbit-matt-hillsdon

bin/update-translations.sh

@@ -15,7 +15,7 @@ if [ $# -eq 0 ]; then
   exit 1
 fi
 
-languages="fr es-ES ja ko nl zh-CN zh-TW"
+languages="ca fr es-ES ja ko nl zh-CN zh-TW"
 
 mkdir -p crowdin/translated
 for language in $languages; do