feat: add OpenJS trademark notice to footer (#2178)

Closes #2172

Signed-off-by: omerbakr <y.omerbakir@gmail.com>

_data/en/footer.yml

@@ -3,4 +3,5 @@ privacy_policy: Privacy Policy
 coc: Code of Conduct
 trademark_policy: Trademark Policy
 security_policy: Security Policy
-license: License
+license: License
+trademark_legal: Copyright <a href='https://openjsf.org'>OpenJS Foundation</a> and Express contributors. All rights reserved. The <a href='https://openjsf.org'>OpenJS Foundation</a> has registered trademarks and uses trademarks. For a list of trademarks of the <a href='https://openjsf.org'>OpenJS Foundation</a>, please see our <a href='https://trademark-policy.openjsf.org'>Trademark Policy</a> and <a href='https://trademark-list.openjsf.org'>Trademark List</a>. Trademarks and logos not indicated on the <a href='https://trademark-list.openjsf.org'>list of OpenJS Foundation trademarks</a> are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

_includes/footer.html

@@ -6,6 +6,9 @@
       <a href="https://openjsf.org/" class="openjs-logo" title="OpenJS Foundation">
          {% include icons/openjs_foundation-logo-horizontal-white.svg %}
       </a>
+      <p id="footer-trademark-legal">
+        {{ site.data[page.lang].footer.trademark_legal | default: site.data.en.footer.trademark_legal }}
+      </p>
       <div id="footer-policy">
         <a href="https://terms-of-use.openjsf.org">
           {{ site.data[page.lang].footer.terms_of_use }}

css/style.css

@@ -735,12 +735,21 @@ footer {
   justify-content: space-between;
   gap: 32px;
   display: flex;
+  flex-direction: column;
+}
+
+#footer-trademark-legal {
+  font-size: 0.8rem;
+  opacity: 0.8;
+  margin-top: 8px;
+  text-align: center;
 }
 
 #footer-copyright {
   display: flex;
   flex-direction: column;
   justify-content: center;
+  align-items: center;
   gap: 20px;
 }