Add automatically default config file after install `real-test-js` library

[VadimNastoyashchy]

• Add an automatic config file to the user project after installing the real-test-js library.
• Add support for launching a runner by searching for a default config file that was created after install library using npm install real-test-js after user launch without arguments. For example: npx real-test-js

[VadimNastoyashchy]

PR>>> https://github.com/VadimNastoyashchy/real-test-js/pull/86