QDS-11236 Simple caching method for the demos

This MR brings the following features;

• add: a simple caching method for the examples
• add: remove button for cached examples
• add: show a warning to the user if something goes wrong when opening/running the project
• add: enhance the performance by clearing the qmlengine cache and resetting it each time when a new project is running
• chore: bumps the app version to 14

assigned to @hancerli

added 1 commit

• 18ad0f49 - fix: rollback auto user register or testing

Compare with previous version

changed the description

requested review from @thhartma

approved this merge request

enabled an automatic merge when the pipeline for 18ad0f49 succeeds

aborted the automatic merge because source branch was updated

added 1 commit

• b5ab9530 - fix: typo

Compare with previous version

enabled an automatic merge when the pipeline for b5ab9530 succeeds

merged