about/credits: move beta tester listing to component

this is to prevent it from showing up in i18n

web/src/components/misc/BetaTesters.svelte

@@ -0,0 +1,32 @@
+<script lang="ts">
+    import OuterLink from "./OuterLink.svelte";
+
+    type Tester = { name: string, url?: string };
+    const credits: Tester[] = [
+        { name: "codfish246" },
+        { name: "damir", url: "https://otomir23.me/" },
+        { name: "Hunter" },
+        { name: "hyperdefined", url: "https://hyper.lol/" },
+        { name: "KwiatekMiki", url: "https://kwiatekmiki.com/" },
+        { name: "Lao", url: "https://lao.ooo/" },
+        { name: "lostdusty", url: "https://lostdusty.dev.br/" },
+        { name: "noblereign", url: "https://fursona.directory/@frost" },
+        { name: "Spax", url: "https://spax.zone/" },
+        { name: "synzr", url: "https://synzr.space/" },
+        { name: "vimae", url: "https://mae.wtf/" }
+    ];
+</script>
+
+<ul>
+    {#each credits as { name, url }}
+        <li>
+            {#if url}
+                <OuterLink href={url}>
+                    {name}
+                </OuterLink>
+            {:else}
+                {name}
+            {/if}
+        </li>
+    {/each}
+</ul>