add svg metadata loading (#3719)

Co-authored-by: filtered <176114999+webfiltered@users.noreply.github.com>

src/scripts/metadata/svg.ts

@@ -0,0 +1,18 @@
+import { ComfyMetadata } from '@/types/metadataTypes'
+
+export async function getSvgMetadata(file: File): Promise<ComfyMetadata> {
+  const text = await file.text()
+  const metadataMatch =
+    /<metadata>\s*<!\[CDATA\[([\s\S]*?)\]\]>\s*<\/metadata>/i.exec(text)
+
+  if (metadataMatch && metadataMatch[1]) {
+    try {
+      return JSON.parse(metadataMatch[1].trim())
+    } catch (error) {
+      console.error('Error parsing SVG metadata:', error)
+      return {}
+    }
+  }
+
+  return {}
+}