create a landing page for teacher advisers

app/views/content/landing/advisers.md

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+---
+title: "Sign up for a free adviser"
+description: If you're thinking about teaching in England, an adviser can offer free one-to-one support as little or as often as you need it.
+content:
+    - content/landing/advisers/header
+    - content/landing/advisers/adviser
+image: "static/images/content/campus-advisers/adviser.jpeg"
+layout: "layouts/minimal"
+colour: green-yellow
+noindex: true
+breadcrumbs: false
+---

app/views/content/landing/advisers/_adviser.html.erb

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+<div class="row">
+  <div class="grey col-space-l">
+    <section class="col col-720 col-space-0">
+         <%= render Content::AdviserComponent.new(
+        title: "Get expert one-to-one support ",
+        intro: "A teacher training adviser can help guide you wherever you are in your journey.",
+        color: "transparent",
+        margin: false,
+        heading: :l
+      ) %>
+    </section>
+  </div>
+</div>

app/views/content/landing/advisers/_header.html.erb

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+<%= render Content::LandingHeroComponent.new(
+  title: "Sign up for a free adviser",
+  colour: @front_matter["colour"],
+  image: @front_matter["image"],
+) %>