Add enum name mapping feature to typescript generators (#18064)

* feat: add enum mapping for typescript

* revert unnecessary change

bin/configs/typescript-angular-v16-provided-in-root.yaml

@@ -5,3 +5,5 @@ templateDir: modules/openapi-generator/src/main/resources/typescript-angular
 additionalProperties:
   ngVersion: 16.1.2
   supportsES6: true
+enumNameMappings:
+  delivered: SHIPPED

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java

@@ -888,6 +888,10 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
 
     @Override
     public String toEnumVarName(String name, String datatype) {
+        if (enumNameMapping.containsKey(name)) {
+            return enumNameMapping.get(name);
+        }
+
         if (name.length() == 0) {
             return getNameUsingEnumPropertyNaming("empty");
         }

samples/client/petstore/typescript-angular-v16-provided-in-root/builds/default/model/order.ts

@@ -30,7 +30,7 @@ export namespace Order {
     export const StatusEnum = {
         Placed: 'placed' as StatusEnum,
         Approved: 'approved' as StatusEnum,
-        Delivered: 'delivered' as StatusEnum
+        SHIPPED: 'delivered' as StatusEnum
     };
 }