Move audit logic to pipes.

src/app/dars/audit/audit.component.html

src/app/dars/audit/audit.component.scss

src/app/dars/audit/audit.component.ts

src/app/dars/dars.module.ts

src/app/dars/pipes/requirement-body.pipe.ts

src/app/dars/pipes/requirement-line.pipe.ts

src/app/dars/pipes/requirement-title.pipe.ts

src/app/dars/pipes/school-college.pipe.ts