Infrastructure: echo necessary environment variables for Qt Creator s…

…etup (Mudlet#7365)

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#### Brief overview of PR changes/additions
Echo necessary environment variables for Qt Creator setup
#### Motivation for adding to Mudlet
Better DevEx when setting up on Windows
#### Other info (issues closed, discussion etc)

CI/setup-windows-sdk.sh

@@ -276,4 +276,12 @@ cd ~ || exit 1
 echo "  ... setup-windows-sdk.sh shell script finished."
 echo ""
 
+echo "Copy the following lines into the build environment for a project in Qt Creator:"
+echo "See https://doc.qt.io/qtcreator/creator-how-set-project-environment.html#change-the-environment-for-a-project"
+echo ""
+MSYS_ROOT=$(cygpath -aw /)
+echo "MINGW_BASE_DIR=${MSYS_ROOT}$(echo ${MSYSTEM_PREFIX} | sed 's/\//\\/g')"
+echo "LUA_PATH=$(luarocks --lua-version 5.1 path --lr-path)"
+echo "LUA_CPATH=$(luarocks --lua-version 5.1 path --lr-cpath)"
+
 exit 0