add page on legacy CopperheadOS branding

We'll want to fill in more details about the history of the project and
historical archives of the code, documentation, tweets, community, etc.

This will help us with trimming down the information on CopperheadOS in
the history page. We want to reduce emphasis on the ongoing conflict and
focus on informing people about what happened in the past.

Immense damage has been done to GrapheneOS by Copperhead's organized
misinformation campaign and we need to do our best to repair it.

static/faq.html

@@ -124,6 +124,7 @@
                     <li><a href="#donate">How can I donate to GrapheneOS?</a></li>
                     <li><a href="#upstream">Does GrapheneOS make upstream contributions?</a></li>
                     <li><a href="#founding">When was the GrapheneOS project founded?</a></li>
+                    <li><a href="#copperheados">How is CopperheadOS related to GrapheneOS?</a></li>
                     <li><a href="#company">Will GrapheneOS create a company?</a></li>
                     <li><a href="#copyright-and-licensing">Who owns the GrapheneOS code and how is it licensed?</a></li>
                     <li><a href="#trademark">What about the GrapheneOS name and logo?</a></li>
@@ -1368,6 +1369,15 @@
                 <a href="/history/">history page</a> for more details.</p>
             </article>
 
+            <article id="copperheados">
+                <h2><a href="#copperheados">How is CopperheadOS related to GrapheneOS?</a></h2>
+
+                <p>GrapheneOS was previously known as CopperheadOS. There's a new closed source
+                product using our legacy CopperheadOS branding and code that's not associated with
+                the original project. See <a href="/history/copperheados">our page on the legacy
+                CopperheadOS branding</a> for more details.</p>
+            </article>
+
             <article id="company">
                 <h2><a href="#company">Will GrapheneOS create a company?</a></h2>