Add documentation for how to enable a new hardware platform support

[SamYuan1990]

@rootfs ,
pre discussed with @marceloamaral , @jiangphcn , @jichenjc , @sunya-ch
personally I want to add a chapter in kepler-doc as enable a new hardware platform for kepler.
as a checklist for people when on board kepler with a new hardware platform as s390.
Here is the check list as overall design for this chapter, and assigned to people as task? and I hope we can make it with in this week, then submit to kubecorn as a proposal from our community.

• Over all description. (add draft for hardware engagement #60 )
  Phase 1
• build kepler code on specific hardware platform from binary to container image.(@SamYuan1990 )
• find out all existing metric as ebfp counter and cgroup to identify resource usage.(@SamYuan1990 , @marceloamaral , @jichenjc )
• find power API to play role as rapi or acpi.(@jiangphcn )
  Phase 2
• model training logic(@sunya-ch , @jiangphcn )
• model training docker image and deployment(@sunya-ch, @jiangphcn , @SamYuan1990 )

Hence, we can use an existing content as proposal to kubecorn.
WDYT?

[rootfs]

@SamYuan1990 sounds good! Looking forward to it. Let me know what we can help with your talk.

[SamYuan1990]

I will try to completed a draft at/before Thursday night and let's discuss on slack.
Honestly, I have two speeches locally in recent, which makes me busy with time.