Update roadmap in documentation

[ethomson]

Summary

Update the roadmap in our documentation.

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Go check out the new roadmap page. 😁

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 52.482% (-0.005%) from 52.487%
when pulling 0819b2a on ethomson/docs_roadmap
into cdb5ae7 on main.