Enable single-click to show object details.

+ Use run-clang-tidy in format script.
+ Fix missing return in QtkWidgetManager.
+ Fix CI tag ref.
+ Add output when starting GUI to explain controls.

tools/format.sh

@@ -11,5 +11,6 @@ cmake -B build && cmake --build build -- -j $(nproc --ignore=1)
 
 # Run clang-tidy and clang-format
 SOURCES="src/**/*.cpp src/**/*.h example-app/*.cpp example-app/*.h"
-clang-tidy -p build/ --fix --config-file=.clang-tidy $SOURCES
+run-clang-tidy \
+    -p build/ -j $(nproc --ignore=1) -fix -config-file=.clang-tidy $SOURCES
 clang-format -i --style=file:.clang-format $SOURCES