init availabilitylist component

packages/atoms/availabilitylist/AvailabilityList.tsx

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+import { EmptyScreen } from " ./EmptyScreen";
+
+export function AvailabilityList({ schedules }: []) {
+  return (
+    <>
+      {schedules.length === 0 ? (
+        <div>
+          <EmptyScreen className="w-full" />
+        </div>
+      ) : (
+        <div>Render availability list here</div>
+      )}
+    </>
+  );
+}

packages/atoms/availabilitylist/EmptyScreen.tsx

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+import type { LucideIcon as IconType } from "lucide-react";
+import type { ReactNode } from "react";
+import React from "react";
+
+import { classNames } from "@calcom/lib";
+import type { SVGComponent } from "@calcom/types/SVGComponent";
+
+export function EmptyScreen({
+  Icon,
+  avatar,
+  headline,
+  description,
+  buttonText,
+  buttonOnClick,
+  buttonRaw,
+  border = true,
+  dashedBorder = true,
+  className,
+}: {
+  Icon?: SVGComponent | IconType;
+  avatar?: React.ReactElement;
+  headline: string | React.ReactElement;
+  description?: string | React.ReactElement;
+  buttonText?: string;
+  buttonOnClick?: (event: React.MouseEvent<HTMLElement, MouseEvent>) => void;
+  buttonRaw?: ReactNode; // Used incase you want to provide your own button.
+  border?: boolean;
+  dashedBorder?: boolean;
+}) {
+  return (
+    <>
+      <div
+        data-testid="empty-screen"
+        className={classNames(
+          "flex w-full select-none flex-col items-center justify-center rounded-lg p-7 lg:p-20",
+          border && "border-subtle border",
+          dashedBorder && "border-dashed",
+          className
+        )}>
+        {!avatar ? null : (
+          <div className="flex h-[72px] w-[72px] items-center justify-center rounded-full">{avatar}</div>
+        )}
+        {!Icon ? null : (
+          <div className="bg-emphasis flex h-[72px] w-[72px] items-center justify-center rounded-full ">
+            <Icon className="text-default inline-block h-10 w-10 stroke-[1.3px]" />
+          </div>
+        )}
+        <div className="flex max-w-[420px] flex-col items-center">
+          <h2
+            className={classNames(
+              "text-semibold font-cal text-emphasis text-center text-xl",
+              Icon && "mt-6"
+            )}>
+            {headline}
+          </h2>
+          {description && (
+            <div className="text-default mb-8 mt-3 text-center text-sm font-normal leading-6">
+              {description}
+            </div>
+          )}
+          {buttonRaw}
+        </div>
+      </div>
+    </>
+  );
+}

packages/atoms/availabilitylist/export.ts

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+export { AvailabilityList } from "./AvailabilityList";
+export * from "../types";