Default values from schema not passed through codegen

[0237h]

Hi,

Seems like when applying default values to some parameters in the OpenAPI spec, those defaults are not carried over in the codegen. This could be useful especially for Zod, etc. when parsing the resulting objects to provide the default value.

Example

"parameters": [
  {
    "name": "test_no_default",
    "in": "query",
    "schema": {
      "type": "string"
    }
  },
  {
    "name": "test_with_default",
    "in": "query",
    "schema": {
      "type": "string",
      "default": "hello world"
    }
  }
]

will generate

parameters: z.object({
  query: z.object({
    test_no_default: z.string().optional(),
    test_with_default: z.string().optional(),
  }),
})

instead of

parameters: z.object({
  query: z.object({
    test_no_default: z.string().optional(),
    test_with_default: z.string().optional().default("hello world"),
  }),
})