Did OpentimelineIO support clip duration when speed up or slow down？

## Feature Request

Did OpentimelineIO support clip duration when speed up or slow down？

## Description
For example,
1. has a video media_reference，duration is [0, 10]。
2. Add it to a Clip。source_range = [0, 10]
3. 2.0x Speed up the clip。Clip show in UI，display_range = [0, 5]。

How to description **speed** and **Display_Range**？

opentime-io Timerange donnot consider speed now? maybe..

## Context

Start by reading the OpenTimelineIO Clip, TimeRange, media_reference, source_range, and display_range concepts mentioned in the issue. Determine how speed changes should be represented and how the example's displayed duration should be expressed; done means the behavior and API representation are defined, with corresponding coverage identified.

Written by the indexing model from the issue text.