Add fib benchmark.
Test
run_tests
^~~
app/playground/CMakeFiles/playground.dir/build.make:62: recipe for target 'app/playground/CMakeFiles/playground.dir/main.cpp.o' failed
CMakeFiles/Makefile2:282: recipe for target 'app/playground/CMakeFiles/playground.dir/all' failed
make[2]: *** [app/playground/CMakeFiles/playground.dir/main.cpp.o] Error 1
make[1]: *** [app/playground/CMakeFiles/playground.dir/all] Error 2
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2
./ci_scripts/run_tests.sh: line 9: ./bin/tests: No such file or directory
ERROR: Job failed: exit code 1