feat: Add CalendarSelector component and install new dependencies.

node_modules/rxjs/dist/cjs/internal/observable/pairs.js

@@ -0,0 +1,9 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.pairs = void 0;
+var from_1 = require("./from");
+function pairs(obj, scheduler) {
+    return from_1.from(Object.entries(obj), scheduler);
+}
+exports.pairs = pairs;
+//# sourceMappingURL=pairs.js.map