Introduce tsup and improve the package.json file in order to support PagesJS.

This works in both dev and prod mode of pagesJS

J=BACK-2545
TEST=manual

Publish an alpha version and test it with yext/search-ui-react#400 and @yext/pages@1.0.0-rc.3. Add several search components to the page and confirm they work as expected.

Add document vertical support by bumping the search-headless version

J=BACK-2523
TEST=manual

Manually tested that I can load the segment result

An automated PR which updates the version number in package.json and package-lock.json files

Bump the search headless beta version in order to revert the rawData breaking change

J=BACK-2523
TEST=compile

Upgrade `@babel/traverse` from v7.16.5 to 7.23.5 to address a critical vulnerability in the package.

J=VULN-38478
TEST=auto

Fix unit tests by pinning `@types/react` to the version that corresponds to the `react` version.

Bump package.json to v2.4.0 and search-headless to v2.5.0.

J=none
TEST=auto

Update tests to run on Node 16 and 18 and drop 14 since `tsup` doesn't seem to support 14.