Recent Events: Create secondary list to display ACM_PINNED=true events

[EthanThatOneKid]

To create this secondary list of pinned events items, we must filter only AcmEvents where isPinned is true. To check if an Google Calendar event is intended to be pinned, we must check for an ACM_PINNED variable in the description. If that variable’s value is truthy, the event isPinned.

[EthanThatOneKid]

We already check to see if a string is truthy in

acmcsuf.com/src/lib/constants/index.ts

Lines 5 to 6 in 4f46f7c

	// DEBUG flag is activated when anything besides '', '0', or 'false' is selected
	export const DEBUG = !['', '0', 'false'].includes(String(import.meta.env.VITE_DEBUG).toLowerCase());

So, we can abstract that into a new utility function to be used in place above and again in makeAcmEvent to check if an event is pinned.

[EthanThatOneKid]

"Recent events" are not necessary to be showcased on the front events page of our website. Perhaps it would be more appropriate to dedicate a new page to recent events, or adding blog posts (with a past-event label) to recount the event.

Despite technically resolving this tracked issue in #477, I will close this issue since we are no longer interested in having this feature located on /events.