feat: Add CalendarSelector component and install new dependencies.

node_modules/rxjs/dist/cjs/internal/firstValueFrom.js

@@ -0,0 +1,28 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.firstValueFrom = void 0;
+var EmptyError_1 = require("./util/EmptyError");
+var Subscriber_1 = require("./Subscriber");
+function firstValueFrom(source, config) {
+    var hasConfig = typeof config === 'object';
+    return new Promise(function (resolve, reject) {
+        var subscriber = new Subscriber_1.SafeSubscriber({
+            next: function (value) {
+                resolve(value);
+                subscriber.unsubscribe();
+            },
+            error: reject,
+            complete: function () {
+                if (hasConfig) {
+                    resolve(config.defaultValue);
+                }
+                else {
+                    reject(new EmptyError_1.EmptyError());
+                }
+            },
+        });
+        source.subscribe(subscriber);
+    });
+}
+exports.firstValueFrom = firstValueFrom;
+//# sourceMappingURL=firstValueFrom.js.map