Merge pull request #77760 from kamranayub/feat/gh-56694/deprecated

feat(Diagnostics): Add proposed DiagnosticTag.Deprecated enum member

src/vs/workbench/api/common/extHostTypeConverters.ts

@@ -108,6 +108,8 @@ export namespace DiagnosticTag {
 		switch (value) {
 			case types.DiagnosticTag.Unnecessary:
 				return MarkerTag.Unnecessary;
+			case types.DiagnosticTag.Deprecated:
+				return MarkerTag.Deprecated;
 		}
 		return undefined;
 	}

src/vs/workbench/api/common/extHostTypes.ts

@@ -773,6 +773,7 @@ export class SnippetString {
 
 export enum DiagnosticTag {
 	Unnecessary = 1,
+	Deprecated = 2
 }
 
 export enum DiagnosticSeverity {