Add new section: OSPO Service providers

[anajsana]

There are many organizations that offer services to OSPO in many areas (consulting, legal, analytics, etc). Maybe it would be interesting to have a dedicated section by adding a new card to the landscape. Some of the organizations appearing there can be:

• Tidelift
• Wipro
• OpenChain
• ???

@caniszczyk comments, thoughts?

[Sealjay]

I'd be up for adding Avanade in this space too :) sounds like a nice filter here.