Add additions/deletions properties to file change classes and display in tree view

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

Author: Copilot

src/common/diffHunk.ts

@@ -349,6 +349,8 @@ export async function parseDiff(
 					gitChangeType,
 					review.filename,
 					review.previous_filename,
+					review.additions,
+					review.deletions,
 				),
 			);
 			continue;
@@ -363,7 +365,9 @@ export async function parseDiff(
 				review.previous_filename,
 				review.patch ?? '',
 				diffHunks,
-				review.blob_url
+				review.blob_url,
+				review.additions,
+				review.deletions,
 			),
 		);
 	}

src/common/file.ts

@@ -21,6 +21,8 @@ export interface SimpleFileChange {
 	readonly fileName: string;
 	readonly blobUrl: string | undefined;
 	readonly diffHunks?: DiffHunk[];
+	readonly additions?: number;
+	readonly deletions?: number;
 }
 
 export class InMemFileChange implements SimpleFileChange {
@@ -32,6 +34,8 @@ export class InMemFileChange implements SimpleFileChange {
 		public readonly patch: string,
 		public readonly diffHunks: DiffHunk[] | undefined,
 		public readonly blobUrl: string,
+		public readonly additions?: number,
+		public readonly deletions?: number,
 	) { }
 }
 
@@ -42,5 +46,7 @@ export class SlimFileChange implements SimpleFileChange {
 		public readonly status: GitChangeType,
 		public readonly fileName: string,
 		public readonly previousFileName: string | undefined,
+		public readonly additions?: number,
+		public readonly deletions?: number,
 	) { }
 }