Add Newsletter Component and Page

- Newsletter form on Subscribe page and at the end of the photos

src/organisms/Footer.svelte

@@ -1,8 +1,12 @@
 <script>
+    import { stores } from '@sapper/app'
     import { site, currentLocation } from 'utils/store'
     // Components
     import LinkTranslate from 'atoms/LinkTranslate'
     import Switcher from 'molecules/Switcher'
+
+    // Variables
+    const { page } = stores()
 </script>
 
 <footer class="footer">
@@ -16,7 +20,10 @@
                 <li>
                     <ul>
                         <li>
-                            <LinkTranslate href="/credits" text="Credits" rel="prefetch" noScroll />
+                            <LinkTranslate href="/subscribe" text="Keep Updated" active={$page.path.includes('subscribe')} rel="prefetch" noScroll />
+                        </li>
+                        <li>
+                            <LinkTranslate href="/credits" text="Credits" active={$page.path.includes('credits')} rel="prefetch" noScroll />
                         </li>
                         {#if $site}
                         <li class="instagram">