Make CI smarter about which tests to run depending on changes

[aryan9600]

Since this is a monorepo, it contains a lot of different sub packages/modules. At the moment, we run tests in CI for all packages regardless of which package is being modified. This leads to extremely long wait times and decreases developer velocity.
We should make the CI figure out which packages are affected by a PR and run tests only for relevant packages. This means running tests not only the modified package but also for packages that depend on the said modified package.