Add custom emoji parsing and display

src/app/components/ContentEmoji.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+  import type {ParsedEmojiValue} from "@welshman/content"
+  import {imgproxy} from "@app/state"
+
+  export let value: ParsedEmojiValue
+
+  const alt = `:${value.name}:`
+</script>
+
+{#if value.url}
+  <img
+    {alt}
+    src={imgproxy(value.url, {w: 24, h: 24})}
+    class="-mt-0.5 inline h-[1em] min-w-[1em] align-middle" />
+{:else}
+  {alt}
+{/if}