feat(stats): count holidays connected to weekends (#68)

src/app/components/calendar-year/calendar-year.html

@@ -1295,6 +1295,14 @@
 					</dt>
 					<dd>{{ formatStatistic(plan.metrics.longestTimeOffPeriod) }}</dd>
 				</div>
+				<div>
+					<dt>
+						{{ tr().planning.statistics.weekendConnectedHolidays }} ({{
+							tr().planning.statistics.calendarDays
+						}})
+					</dt>
+					<dd>{{ formatStatistic(weekendConnectedHolidays()) }}</dd>
+				</div>
 				<div>
 					<dt>
 						{{ tr().planning.statistics.earnedLeave }} ({{