[WIP] New client challenges (#8842)

* Added initial challenge pages

* Added challenge item and find guilds page

* Added challenge detail

* Added challenge modals

* Ported over challenge service code

* Ported over challenge ctrl code

* Added styles and column

* Minor modal updates

* Removed duplicate keys

* Fixed casing

website/client/components/challenges/index.vue

@@ -0,0 +1,19 @@
+<template lang="pug">
+.row
+  secondary-menu.col-12
+    router-link.nav-link(:to="{name: 'myChallenges'}", :class="{'active': $route.name === 'myChallenges'}") {{ $t('myChallenges') }}
+    router-link.nav-link(:to="{name: 'findChallenges'}", :class="{'active': $route.name === 'findChallenges'}") {{ $t('findChallenges') }}
+
+  .col-12
+    router-view
+</template>
+
+<script>
+import SecondaryMenu from 'client/components/secondaryMenu';
+
+export default {
+  components: {
+    SecondaryMenu,
+  },
+};
+</script>