feat(docs): Add GitHub discussions links

docs/layouts/partials/footer.html

@@ -31,6 +31,12 @@
                             Join us on Slack</a
                         >
                     </li>
+                    <li>
+                        <a href="https://github.com/vendure-ecommerce/vendure/discussions"
+                            ><img class="link-icon" alt="GitHub logo" src="/svg/icon-github-inverse.svg" />
+                            Support Forum</a
+                        >
+                    </li>
                     <li>
                         <a href="mailto:contact@vendure.io" class="email-link"
                             ><img src="/svg/clr-icon-email-light.svg" class="link-icon" alt="email icon" />

docs/layouts/partials/top-bar.html

@@ -45,6 +45,10 @@
                         <img class="menu-icon" alt="icon" src="/svg/icon-github-inverse.svg" />
                         GitHub
                     </a>
+                    <a href="https://github.com/vendure-ecommerce/vendure/discussions">
+                        <img class="menu-icon" alt="icon" src="/svg/icon-github-inverse.svg" />
+                        Support Forum
+                    </a>
                     <a href="https://join.slack.com/t/vendure-ecommerce/shared_invite/enQtNzA1NTcyMDY3NTg0LTMzZGQzNDczOWJiMTU2YjAyNWJlMzdmZGE3ZDY5Y2RjMGYxZWNlYTI4NmU4Y2Q1MDNlYzE4MzQ5ODcyYTdmMGU">
                         <img class="menu-icon" alt="icon" src="/logo/slack-logo-icon-127x127.png" />
                         Community