Refactor Term Container and Course Item

src/app/degree-planner/degree-planner.component.html

src/app/degree-planner/degree-planner.component.ts

src/app/degree-planner/degree-planner.module.ts

...ree-planner/shared/course-item/course-item.component.html

...egree-planner/shared/course-item/course-item.component.ts

src/app/degree-planner/shared/shared.module.ts

...gree-planner/term-container/term-container.component.html

...degree-planner/term-container/term-container.component.ts

src/app/shared/academic-year-state.pipe.ts