Implement const object-style enum generation in place of traditional TypeScript

enum keyword objects.

Closes #1040.

Author: bjohnso5

index.ts

@@ -184,7 +184,7 @@ const generateCommand = defineCommand({
     "generate-const-object-enums": {
       type: "boolean",
       description:
-        'generate all "enum" types as pairs of const objects and types derived from those objects\' keys',
+        'generate all "enum" types as pairs of const objects and types derived from those objects\' keys. Mutually exclusive with, and pre-empted by, generateUnionEnums',
       default: codeGenBaseConfig.generateConstObjectEnums, // TODO: collapse enum booleans into a single field taking an enum?
     },
     "http-client": {