fix: parcel serve target dist directory

[pedroslvieira]

The examples were not working on dev environment after running npm start because there is a bug in parcel that is ignoring the distDir attribute in targets for parcel serve. I replaced with cli commands and added a prestart hook with the commands that were in build-examples to add parts that are not compiled by parcel (should we also investigate that?).

bug reports in parcel: https://github.com/parcel-bundler/parcel/issues/8715 https://github.com/parcel-bundler/parcel/issues/8105 https://github.com/parcel-bundler/parcel/discussions/6778

Also, should I just remove the targets object from the code?

[gberaudo]

Thanks again!