Incorrect `import type` and value space reference in const+typeof generation for schemas with both enum and const

[ioslh]

When a schema property has both enum and const fields, and the schema contains only properties
with const values, orval generates incorrect TypeScript code with two issues:

1. Wrong import statement: Uses import type instead of import for enum constants used as
   values
2. Type/value space confusion: References enum type name as a value in const object

import type { AType } from './aType';

export const AValue = {
  type: AType, // 'AType' cannot be used as a value because it was imported using 'import type'.
} as const;
export type A = typeof AValue;

Reproduction

See minimal reproduction example: https://github.com/ioslh/temp-orval-generate

• openapi.json
• orval config
• the generated type with import error: https://github.com/ioslh/temp-orval-generate/blob/master/src/model/a.ts

You can clone the repo and run npm run generate to see the generated result.