Added npm run rsync-built-files-to-adjacent-openwpm-repo

[motin]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

An npm run command for fast syncing of the built files into the OpenWPM extension's node_modules folder, which speeds up testing of modified instrumentation during development.

• What is the current behavior? (You can also link to an open issue here)

Testing changes in the instrumentation requires modifying package.json or using npm link, which conflicts with webpack/typescript module resolution.

• What is the new behavior (if this is a feature change)?

After modifying the instrumentation, one can run npm run build && npm run rsync-built-files-to-adjacent-openwpm-repo in the openwpm-webext-instrumentation repo, followed by ./build-extension.sh in the adjacent OpenWPM repo, to have a local OpenWPM setup that uses the modified instrumentation.

[nhnt11]

I think there are better solutions than rsync. Monorepo is one; another is to use a local dependency in package.json in the extension.

[motin]

Closing this in favor of short-term monorepo openwpm/OpenWPM#300