V2 change metadata (#4433)

# Description of Changes
Add Change Metadata tool

frontend/src/types/metadata.ts

@@ -0,0 +1,24 @@
+export enum TrappedStatus {
+  TRUE = 'True',
+  FALSE = 'False',
+  UNKNOWN = 'Unknown'
+}
+
+export interface CustomMetadataEntry {
+  key: string;
+  value: string;
+  id: string; // For React uniqueness
+}
+
+export interface ExtractedPDFMetadata {
+  title: string;
+  author: string;
+  subject: string;
+  keywords: string;
+  creator: string;
+  producer: string;
+  creationDate: string;
+  modificationDate: string;
+  trapped: TrappedStatus;
+  customMetadata: CustomMetadataEntry[];
+}