feat: update schedule parsing service to retrieve classrooms

[a23kumar]

fixes #171

This PR updates the schedule parsing service to extract and return classroom information from schedule data.

Changes

• Added classroom parsing logic to schedule.go
• Updated tests for new Classrooms field in schedule_test.go

This will allow the API to provide classroom details along with existing schedule information.

[SamirRSharma]

This breaks UW API policy. UW flow has not been allowed to parse classrooms since the HH stabing (unless we make it behind afds)

[a23kumar]

This is not accessing UW's API. This is an update to the schedule parsing service. All room data is private to the user and is unique to their schedule that they have provided. I think I wrongly named this PR causing this confusion, and I have renamed it correctly.

[SamirRSharma]

Sorry the name confused me, sorry about that