Is your feature request related to a problem? Please describe.
We want to generate a library with some common steps. For example, a step that sends a REST request, a step that checks the status code, a step that validates the response, and a step that checks a HTTP header from the response. In this way, we could reuse some common steps.
However, godog only passes the regex parameters as arguments. We could use a struct and create methods for that type. But we wouldn't get reusable steps in any scenario.

Describe the solution you'd like
I'd like that each scenario creates a context.Context instance (or custom context) and the context is passed as first argument in each step function. Instead of:

func thereAreGodogs(available int) error {

we would have:

func thereAreGodogs(context.Context ctx, available int) error {

Note that context.Context is immutable. So we would need to create a map to store all context changes related to godog, to return the context to chain the context for the next step, or to use a custom context type.

Describe alternatives you've considered
We could use InitializeScenario for this purpose but it would require a lot of repetitive code for each step:

func InitializeScenario(ctx *godog.ScenarioContext) {
	var stepCtx godog.Context
	ctx.Step(`^there are (\d+) godogs$`, func(available int) {
		thereAreGodogs(stepCtx, available)
	})
	...
}

Additional context
See GoBDD that follows this approach. See also the motivations to write an alternative to Godog which I consider to be very good feedback for possible improvements in Godog.