Implement Response Wrapper

[tarunKoyalwar]

Please describe your feature request:

• Implement Response Wrapper similar to

  retryablehttp-go/request.go

  Line 18 in bbfecc2

  type Request struct {

• Auto Handle Content-Length Value from net/http is -1 nuclei#2314
• Use ReusableResponseBody if requested
• Drain method to Drain response body (to allow connection reuse)
• DSLMap method that returns DSL variables of response

Describe the use case of this feature:

• Abstract most common helper methods across all pd projects
• Promote Connection Reuse if response body is not read
• Auto Handle when content-length is -1