This commit adds a script for performance measurement using the Chrome DevTools tracing.
Currently the startup time of the browser-app is being measured.
The script uses Puppeteer so other processes can be measured in the future as well.
For more information see the README in the scripts/performance directory.

Contributed on behalf of STMicroelectronics

Signed-off-by: Simon Graband <sgraband@eclipsesource.com>