ModuleResource staff view: Enforce category titlecasing and tag lowercasing. Add transparency effect to indicate invisible resources in staff resource list

Request module list from backend, and switch resource view depending on relationship to course (student/staff)

Note: The colours were corrected.

ModuleResource staff view: Add resource reordering and loose form validation. Add Jumbotron for errors/warnings.

Note: Dark mode support was added

Implement Timeline with css grid

See merge request edtech/scientia!9

# Conflicts:
#   src/components/molecules/SearchBox/index.tsx
#   src/constants/types.ts