fix(core): implement {} insterd of unknown for blank schema interface

[soartec-lab]

Status

READY/

Description

fix #1207

If the definition schema is blank object and output.override.use TypeOver Interfaces is false, the generated definition is incorrect.
I fixed it to create {} when using interface.

Before

export interface DbNotificationID unknown

After

export interface DbNotificationID = {}

Related PRs

none

Todos

• Tests
• Documentation
• Changelog Entry (unreleased)

Steps to Test or Reproduce

1. prepared openapi woth blank object

openapi: 3.0.3
info:
  description: test
  title: test
  version: test
paths:
  /ping:
    get:
      summary: test
      responses:
        '200':
          description: ok
components:
  schemas:
    DbNotificationID: {}

2. execute orval
3. check generated definition is valid

[melloware]

@soartec-lab this broke React Query in 6.25.0 I now get these TypeScript errors.

  Line 26:40:  Don't use `{}` as a type. `{}` actually means "any non-nullish value".
- If you want a type meaning "any object", you probably want `object` instead.
- If you want a type meaning "any value", you probably want `unknown` instead.
- ```

in 6.24.0 code was this

```js
export interface FilterConstraint {
	/** Filter match mode e.g. equals, notEquals, contains, notContains, gt, gte, lt, lte */
	matchMode?: string;
	/** Value to filter this column by */
	value?: unknown;
}

in 6.25.0 its this...

/**
 * Value to filter this column by
 */
export type FilterConstraintValue = {};

export interface FilterConstraint {
	/** Filter match mode e.g. equals, notEquals, contains, notContains, gt, gte, lt, lte */
	matchMode?: string;
	/** Value to filter this column by */
	value?: FilterConstraintValue;
}

Which is now broken.