encoding in RequestBody: properly support encoding in "RequestBody"

[excavador]

I would like to describe RequestBody for multipart/form-data content-type with encoding to particular fields

Description

The multipart/form-data content-type allows you to describe "contentType" for individual fields.
Right now I am receiving the problem like the following:

Feature "form content encoding" is not implemented yet.
Try to create ogen.yml with:

generator:
	ignore_not_implemented: "form content encoding"

or

generator:
	ignore_not_implemented: ["all"]

to skip unsupported operations.

generation failed:
    main.run
        /home/oleg/go/pkg/mod/github.com/ogen-go/ogen@v0.81.1/cmd/ogen/main.go:308
exit status 1
make: *** [Makefile:80: api/client/example/ogen/oas_client_gen.go] Error 1

for the following RequestBody

  requestBodies:
    PetCreate:
      content:
        multipart/form-data:
          encoding:
            document:
              contentType: application/vc+ld+json
            pet:
              contentType: application/json
            tags:
              contentType: application/json
          schema:
            $ref: '#/components/schemas/PetCreate'
      required: true
    PetUpdate:
      content:
        multipart/form-data:
          encoding:
            document:
              contentType: application/vc+ld+json
            pet:
              contentType: application/json
            tags:
              contentType: application/json
          schema:
            $ref: '#/components/schemas/PetUpdate'
      required: true
  schemas:
    PetCreate:
      type: object
      description: Schema for create pet's resource.
      required:
        - tags
        - document
        - pet
      properties:
        tags:
          $ref: #/components/schemas/Tags
        document:
          type: string
          format: binary
          description: Schema for document linked to pet's resource.
        pet:
          $ref: '#/components/schemas/Pet'
    PetDocument:
      type: string
      format: binary
      description: Schema for document linked to pet's resource.
    TagKey:
      type: string
      description: Key of tag of resource.
    TagValue:
      type: string
      description: Value of the tag of the resource.
    Tags:
      type: object
      additionalProperties:
        $ref: '#/components/schemas/TagValue'
    Pet:
      type: object
      description: A pet.
      required:
        - nickname
        - issued
      properties:
        nickname:
          type: string
          description: Nickname of a pet.
        issued:
          type: string
          format: date
          description: Issuance date.
          readOnly: true

in the config file I specified the following

generator:
  content_type_aliases:
    application/problem+json: application/json
    application/vc+ld+json:   application/octet-stream

References

OpenAPI v3.0.3 specification - Encoding Object