Add Blog Post: "Rerum Playground: Milestones and the Road Ahead"

[alar12]

Description: This PR adds a blog post highlighting Rerum Playground's recent milestones, including its contributions to accessibility and innovation.

[kungfuchicken]

This is a good start, but it needs a little more work.

• Ensure it is written using a corporate voice;
• It should highlight the milestone achievements more, especially the deployment and initial features;
• Add screenshots of the GitHub Pages;
• Add a link to the GitHub Pages;
• Consider getting comments from the @jacksayshi on his role, contributions, and reactions to current state after he parted with the project;
• Consider getting comments from the @cubap and @thehabes about their expectations and reactions;

Overall this is a solid start, and just needs some refinement. Take a look at #147 for an example of what that might look like.