docs(pricing): add pricing page

Add a pricing page for my paid products and services.

src/pages/pricing.mdx

@@ -0,0 +1,31 @@
+---
+layout: ~/layouts/PageLayout.astro
+title: Products and Services
+---
+
+import ListingPage from "~/components/ListingPage.astro";
+import _ from "lodash";
+import products from "~/products.json";
+
+export const priceFormatter = new Intl.NumberFormat('en-GB', {
+  currency: 'GBP',
+  maximumSignificantDigits: 2,
+  style: 'currency',
+});
+
+<div class="space-y-6">
+  {products && products.map(product => (
+    <article class="space-y-4">
+      <h2>
+        {product.title} - {priceFormatter.format(product.price)}
+        {product.perMonth && (<> per month</>)}
+      </h2>
+
+      <div>{product.description}</div>
+
+      <footer>
+        <a href={product.link.href}>{product.link.text} &rarr;</a>
+      </footer>
+    </article>
+  ))}
+</div>

src/products.json

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+[
+  {
+    "title": "Drupal upgrade roadmap",
+    "description": "Are you stuck on an already or soon-to-be unsupported version of Drupal? Get a personalised roadmap of your Drupal website, including details and actionable steps to upgrade it.",
+    "price": 5000,
+    "link": {
+      "text": "Book your roadmap now",
+      "href": "/drupal7"
+    }
+  },
+  {
+    "title": "Development team coaching",
+    "description": "Do you want to upskill your in-house team or have someone provide oversight and guidance as they deliver a project? Get unlimited 1-on-1 private Slack access to me and regular check-in calls to ensure things are on track.",
+    "perMonth": true,
+    "price": 5000,
+    "link": {
+      "text": "Apply now",
+      "href": "https://forms.gle/HGEC3uqkUSqPsoK79"
+    }
+  },
+  {
+    "title": "Private talk or workshop",
+    "description": "If you found one of my public speaking presentations or workshops useful, I'm available for private speaking engagements on a variety of topics to help your team succeed.",
+    "price": 2000,
+    "link": {
+      "text": "Schedule a talk",
+      "href": "https://buy.stripe.com/eVa4h0bgSaPM6NqcMU"
+    }
+  },
+  {
+    "title": "1-on-1 consulting call",
+    "description": "Book a 1-on-1 video call and I can help you answer questions in areas such as software development, architecture, testing, and automation.",
+    "price": 350,
+    "link": {
+      "text": "Book your call now",
+      "href": "/call"
+    }
+  },
+  {
+    "title": "Pair program with me",
+    "description": "Would you like another pair of eyes on your code, providing real-time suggestions and feedback rather than waiting for a code review? Book a 2-hour pair programming call and we can work on your code together.",
+    "price": 499,
+    "link": {
+      "text": "Book your session now",
+      "href": "/pair"
+    }
+  }
+]