This adds support for `next telemetry disable` (and keeps support for `next telemetry --disable`).
This also informs the user telemetry was already disabled if they re-run the command to give peace of mind.
* Run prettier over packages/**/*.js
* Run prettier over packages/**/*.ts
* Run prettier over examples
* Remove tslint
* Run prettier over examples
* Run prettier over all markdown files
* Run prettier over json files
* Remove CLI and negative page building
* Remove select all tests
* Update test of getSpecifiedPages
* Prune old tests from snapshot
* Remove old flying shuttle tests