Deserialize path param to int

[EwenQuim]

Is your feature request related to a problem? Please describe.

It's not convenient to write

id, err := strconv.Atoi(c.PathParam("id"))
if err != nil {
    return nil, fuego.BadRequestError{
        Title:  "Invalid ID",
        Detail: "The provided ID is not a valid integer.",
        Err:    err,
    }
}

see #372 (comment)

Describe the solution you'd like

From a user POV, we want 2 more functions in the context:

• PathParamInt(name string) int
• PathParamIntErr(name string) (int, error)

They will be used like this:

id := c.PathParamInt("id")

// or 

id, err := c.PathParamIntErr("id")
if err != nil {
    return nil, err
}

Additional context

Please add

• signature in ContextWithBody
• implementation for
  • netHttpContext
  • ginContext
  • echoContext

Please mimic (and mutualise if it can be done nicely) what is done for QueryParamInt

@dylanhitt should we add uint to handle case between max Int and max Uint, or is it too niche?

[thezbm]

Can I be assigned to this? I'd love to give it a go.

[EwenQuim]

No problem!