Generates structs with *any fields for "anyOf": [{ "type": "string" }, { "type": "null" }] query params

[antifuchs]

I'm noticing a few structs in the openapi definition from #15 being generated that are unusable: The fields have *any member types, which I haven't found a way to construct a value for, yet.

One schema in the openapi json from #15 that seems to trigger that is:

            "schema": {
              "anyOf": [{ "type": "string" }, { "type": "null" }],
              "title": "Search"
            }

This results in a struct like:

type GetAllAPIRecipesGetParams struct {
	Categories           *any            `json:"categories,omitempty"`
	Tags                 *any            `json:"tags,omitempty"`
	Tools                *any            `json:"tools,omitempty"`
	Foods                *any            `json:"foods,omitempty"`
	Households           *any            `json:"households,omitempty"`
	OrderBy              *any            `json:"orderBy,omitempty"`
	OrderByNullPosition  *any            `json:"orderByNullPosition,omitempty"`
	OrderDirection       *OrderDirection `json:"orderDirection,omitempty"`
	QueryFilter          *any            `json:"queryFilter,omitempty"`
	PaginationSeed       *any            `json:"paginationSeed,omitempty"`
	Page                 *int64          `json:"page,omitempty"`
	PerPage              *int64          `json:"perPage,omitempty"`
	Cookbook             *any            `json:"cookbook,omitempty"`
	RequireAllCategories *bool           `json:"requireAllCategories,omitempty"`
	RequireAllTags       *bool           `json:"requireAllTags,omitempty"`
	RequireAllTools      *bool           `json:"requireAllTools,omitempty"`
	RequireAllFoods      *bool           `json:"requireAllFoods,omitempty"`
	Search               *any            `json:"search,omitempty"`
	AcceptLanguage       *any            `json:"accept-language,omitempty"`
}

...seems not ideal - I would expect *string here, given the schema.