Add sponsorships and sponsorship levels to site

[shillasaebi]

Add a section or page for sponsorships we have and include logos/links to the foundation sites.

Organization | Sponsorship Type

Cloud Foundry Foundation | Silver Member https://www.cloudfoundry.org

Cloud Native Computing Foundation | Silver Member https://www.cncf.io

OpenStack Foundation | Member https://www.openstack.org

Apache Software Foundation | Platinum Member https://www.apache.org

Linux Foundation | Silver Member https://www.linuxfoundation.org

Yocto Project | Member https://www.yoctoproject.org

OpenChain Foundation | Member https://www.openchainproject.org

ToDoGroup | Member https://todogroup.org

RDK | Preferred Member https://rdkcentral.com

[ericxedge]

While looking to participate in the upcoming hackathon day I found this roadmap and started to work on it early. I will have a commit soon.