Add support for the Perch from scraping function

[akrishan11]

The current DineOnCampus scraping function only supports scraping data from the Eatery.

Modify this function to take in a argument that specifies which of the two dining halls we want to pull data for. Write data for the Perch to a new folder at ~/mock-data/perch which will have its own breakfast.json, lunch.json, and dinner.json files