feat(ui): Modify Calendar Footer design and Unscheduled courses (#503)

* feat: update styling and text for unscheduled courses in footer

* refactor: correct offwhite theme colors

* fix(ui): adjust em dash spacing, footer bottom padding, and vertically align course text

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Co-authored-by: doprz <52579214+doprz@users.noreply.github.com>

src/shared/types/ThemeColors.ts

@@ -18,8 +18,7 @@ export const colors = {
     theme: {
         red: '#D10000',
         black: '#1A2024',
-        offwhite1: ' #D6D2C450',
-        offwhite2: '#D6D2C420',
+        offwhite: '#D6D2C4',
         black1: '#333F4850',
         black2: '#333F4820',
         staticwhite: '#FFFFFF',