Add number format in DecimalField

[zuerst]

Feature Request

Description

Django models.DecimalField produces type number, format:decimal but the format decimal is not an officially supported OpenAPI type. Available types are float or double

rate = models.DecimalField(max_digits=6, decimal_places=4, blank=True, null=True)

      rate:
        title: Rate
        type: number
        format: decimal
        default: 0.0
        minimum: 0.0

Describe the solution you'd like

rate = models.DecimalField(max_digits=6, decimal_places=4, blank=True, null=True)

      rate:
        title: Rate
        type: number
        format: decimal
        default: 0.0
        minimum: 0.0

rate = models.DecimalField(max_digits=6, decimal_places=4, blank=True, null=True, number_format='float')

      rate:
        title: Rate
        type: number
        format: float
        default: 0.0
        minimum: 0.0

rate = models.DecimalField(max_digits=6, decimal_places=4, blank=True, null=True, number_format='double')

      rate:
        title: Rate
        type: number
        format: double
        default: 0.0
        minimum: 0.0