Add Nick Schrock testimonial and subtitles to wall of love (#297)

* Add Nick Schrock testimonial and subtitles to wall of love

- Add Nick Schrock (@schrockn, Dagster Labs founder, GraphQL co-creator) testimonial
- Add subtitle field for notable contributors (Mitchell Hashimoto, Nick Schrock)
- Render subtitle in TestimonialCard between name and handle

* Add Nick Schrock profile photo

* Download avatar images to repo instead of hotlinking

* Show subtitle after name in attribution lines

web/app/page.tsx

@@ -243,7 +243,7 @@ export default function Home() {
                         className="rounded-full inline-block"
                       />
                     )}
-                    {t.name}
+                    {t.name}{"subtitle" in t && t.subtitle ? `, ${t.subtitle}` : ""}
                   </a>
                 </span>
               </li>

web/app/testimonials.tsx

@@ -2,12 +2,21 @@ export const testimonials = [
   {
     name: "Mitchell Hashimoto",
     handle: "@mitchellh",
-    avatar:
-      "https://pbs.twimg.com/profile_images/1141762999838842880/64_Y4_XB_400x400.jpg",
+    subtitle: "Creator of Ghostty and founder of HashiCorp",
+    avatar: "/avatars/mitchellh.jpg",
     text: "Another day another libghostty-based project, this time a macOS terminal with vertical tabs, better organization/notifications, embedded/scriptable browser specifically targeted towards people who use a ton of terminal-based agentic workflows.",
     url: "https://x.com/mitchellh/status/2024913161238053296",
     platform: "x" as const,
   },
+  {
+    name: "Nick Schrock",
+    handle: "@schrockn",
+    subtitle: "Creator of Dagster. GraphQL co-creator.",
+    avatar: "/avatars/schrockn.jpg",
+    text: "This is exactly the product I've been looking for. After two hours this am I've in love.",
+    url: "https://x.com/schrockn/status/2025182278637207857",
+    platform: "x" as const,
+  },
   {
     name: "johnthedebs",
     handle: "johnthedebs",
@@ -19,8 +28,7 @@ export const testimonials = [
   {
     name: "Joe Riddle",
     handle: "@joeriddles10",
-    avatar:
-      "https://pbs.twimg.com/profile_images/1466920091707076608/pxfGMeC0_400x400.jpg",
+    avatar: "/avatars/joeriddles10.jpg",
     text: "Vertical tabs in my terminal \u{1F924} I never thought of that before. I use and love Firefox vertical tabs.",
     url: "https://x.com/joeriddles10/status/2024914132416561465",
     platform: "x" as const,
@@ -116,6 +124,11 @@ export function TestimonialCard({
           <div className="font-medium text-sm truncate">
             {testimonial.name}
           </div>
+          {"subtitle" in testimonial && testimonial.subtitle && (
+            <div className="text-xs text-muted truncate">
+              {testimonial.subtitle}
+            </div>
+          )}
           <div className="text-xs text-muted truncate">
             {testimonial.handle}
           </div>