Add contact form, cookie banner, and update packages

This commit includes the addition of a contact form and a cookie banner to improve user experience and comply with regulations. The contact form involves email submission functionality. Several packages have also been updated and new routes have been added to the sitemap for better SEO. Environment variables have also been adjusted for email and contact form functionality.

packages/ui/src/makerkit/cookie-banner.tsx

@@ -0,0 +1,120 @@
+'use client';
+
+import { useCallback, useMemo, useState } from 'react';
+
+import * as DialogPrimitive from '@radix-ui/react-dialog';
+
+import { Button } from '../shadcn/button';
+import { Heading } from '../shadcn/heading';
+import { Trans } from './trans';
+
+// configure this as you wish
+const COOKIE_CONSENT_STATUS = 'cookie_consent_status';
+
+enum ConsentStatus {
+  Accepted = 'accepted',
+  Rejected = 'rejected',
+  Unknown = 'unknown',
+}
+
+export function CookieBanner() {
+  const { status, accept, reject } = useCookieConsent();
+
+  if (!isBrowser()) {
+    return null;
+  }
+
+  if (status !== ConsentStatus.Unknown) {
+    return null;
+  }
+
+  return (
+    <DialogPrimitive.Root open modal={false}>
+      <DialogPrimitive.Content
+        className={`dark:shadow-primary-500/40 fixed bottom-0
+             w-full max-w-lg border bg-background p-6 shadow-2xl
+             delay-1000 duration-1000 animate-in fade-in zoom-in-95
+             slide-in-from-bottom-16 fill-mode-both lg:bottom-[2rem] lg:left-[2rem] lg:h-48 lg:rounded-lg`}
+      >
+        <div className={'flex flex-col space-y-4'}>
+          <div>
+            <Heading level={3}>
+              <Trans i18nKey={'cookieBanner.title'} />
+            </Heading>
+          </div>
+
+          <div className={'text-gray-500 dark:text-gray-400'}>
+            <Trans i18nKey={'cookieBanner.description'} />
+          </div>
+
+          <div className={'flex justify-end space-x-2.5'}>
+            <Button variant={'ghost'} onClick={reject}>
+              <Trans i18nKey={'cookieBanner.reject'} />
+            </Button>
+
+            <Button autoFocus onClick={accept}>
+              <Trans i18nKey={'cookieBanner.accept'} />
+            </Button>
+          </div>
+        </div>
+      </DialogPrimitive.Content>
+    </DialogPrimitive.Root>
+  );
+}
+
+export function useCookieConsent() {
+  const initialState = getStatusFromLocalStorage();
+  const [status, setStatus] = useState<ConsentStatus>(initialState);
+
+  const accept = useCallback(() => {
+    const status = ConsentStatus.Accepted;
+
+    setStatus(status);
+    storeStatusInLocalStorage(status);
+  }, []);
+
+  const reject = useCallback(() => {
+    const status = ConsentStatus.Rejected;
+
+    setStatus(status);
+    storeStatusInLocalStorage(status);
+  }, []);
+
+  const clear = useCallback(() => {
+    const status = ConsentStatus.Unknown;
+
+    setStatus(status);
+    storeStatusInLocalStorage(status);
+  }, []);
+
+  return useMemo(() => {
+    return {
+      clear,
+      status,
+      accept,
+      reject,
+    };
+  }, [clear, status, accept, reject]);
+}
+
+function storeStatusInLocalStorage(status: ConsentStatus) {
+  if (!isBrowser()) {
+    return;
+  }
+
+  localStorage.setItem(COOKIE_CONSENT_STATUS, status);
+}
+
+function getStatusFromLocalStorage() {
+  if (!isBrowser()) {
+    return ConsentStatus.Unknown;
+  }
+
+  const status = localStorage.getItem(COOKIE_CONSENT_STATUS) as ConsentStatus;
+
+  return status ?? ConsentStatus.Unknown;
+}
+
+function isBrowser() {
+  return typeof window !== 'undefined';
+}