feat: Add CalendarSelector component and install new dependencies.

node_modules/rxjs/dist/cjs/internal/operators/isEmpty.js

@@ -0,0 +1,18 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.isEmpty = void 0;
+var lift_1 = require("../util/lift");
+var OperatorSubscriber_1 = require("./OperatorSubscriber");
+function isEmpty() {
+    return lift_1.operate(function (source, subscriber) {
+        source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function () {
+            subscriber.next(false);
+            subscriber.complete();
+        }, function () {
+            subscriber.next(true);
+            subscriber.complete();
+        }));
+    });
+}
+exports.isEmpty = isEmpty;
+//# sourceMappingURL=isEmpty.js.map