Vite replacing react-scripts

[BoykoAlex]

Replacing abandoned react-scripts with vite. Seems to build, execute tests and run locally without issues.

The only grey area is the need for @pact-foundation/pact in dev dependencies and json file under pacts. This might be used in some tests but I didn't look further. The @pact-foundation/pact dependency is the only one that has 2 medium vulnerabilities.

Not sure how to test this with TAP - leaving this for reviewer(s)