Resolve "Display date on "Pending" request for a slotted lab"

What does this mr do?

Adds a date to the request view of a time slot in a lab.

Screenshots

after

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made.
• Tests were created to test the feature.
• I have updated the documentation accordingly.
• I adhere to the style guide.

Closes #238 (closed)

src/main/java/nl/tudelft/ewi/queue/model/Lab.java

@@ -459,10 +459,11 @@ public class Lab implements Serializable {
 	}
 
 	private String formatPositionTimeSlot(RequestSlot slot) {
-		DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm");
-		String start = slot.getOpensAt().format(formatter);
-		String end = slot.getClosesAt().format(formatter);
-		return start + " - " + end;
+		DateTimeFormatter formatterTime = DateTimeFormatter.ofPattern("HH:mm");
+		DateTimeFormatter formatterDate = DateTimeFormatter.ofPattern("MMMM d yyyy");
+		String start = slot.getOpensAt().format(formatterTime);
+		String end = slot.getClosesAt().format(formatterTime);
+		return slot.getOpensAt().format(formatterDate) + " at " + start + " - " + end;
 	}
 
 	public Boolean slotIsAvailable(RequestSlot slot) {