[PRIMARY FEATURE] Course Data Caching

[GuyWhoCode]

User Story

As a developer, I want to reduce the strain experienced by the backend server.

Technical Tasks

• When course data is received, temporarily cache the data using Chrome's extension storage
• The data should be erased when the login session expires.

Acceptance Criteria

• Course data loads in almost-instant time with no request sent to the backend.

Related Issues

• [PRIMARY FEATURE] Course Progess #106
• [PRIMARY FEATURE] Degree Progress Report Page #104