Add spheron details on ecosystem page

[rekpero]

Describe your changes

Added Spheron details on the Ecosystem page created for Spheron specifically. Added all the toolings and SDKs that we provide.

Files changed

• docs/how-to/spheron.md

Checklist before requesting a review

• Passing the beta version of the Check Markdown links for modified files check. Action results can be viewed here.

Checklist before merging

• Passing all required checks (The beta Check Markdown links for modified files check is not required)