🚀 Add ctx.PureJSON() to response json without HTML escape

[david7482]

Is your feature request related to a problem?
By using ctx.JSON(), it would always do HTML escape because it's the default behavior of json.Marshal().

app.Get("/json", func(c *fiber.Ctx) {
	c.Status(fiber.StatusOK).JSON(map[string]string{
		"message": "<foo> hello&",
	})
})

$ curl localhost:8080/json
{"message":"\u003cfoo\u003e hello\u0026"}

Describe the solution you'd like
Add a new function which would use a custom json encoder by SetEscapeHTML(false).
gin's implementation

Currently, I need to implement this in app side then set the body manually.

I would love to support this PR if you want to add this feature.
Thanks

[Fenny]

#693 (comment)