docs(roadmap): add new roadmap section

[heitorlessa]

Issue number: #1009

Summary

Changes

Please provide a summary of what's being changed

Add new roadmap section as we migrate from the roadmap central repository. It also highlights our upcoming public board using the new Projects Beta: https://github.com/orgs/awslabs/projects/51/views/11?query=is%3Aopen+sort%3Aupdated-desc

User experience

Please share what the user experience looks like before and after this change

Some visuals

WIP Board: https://github.com/orgs/awslabs/projects/51/views/11?query=is%3Aopen+sort%3Aupdated-desc

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• Meet tenets criteria
• I have performed a self-review of my this change
• Changes are tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Disclaimer: We value your time and bandwidth. As such, any pull requests created on non-triaged issues might not be successful.

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View rendered docs/roadmap.md

[codecov-commenter]

Codecov Report

Merging #1204 (36d5d18) into develop (1ca74d3) will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@ ## develop #1204 +/- ## ======================================== Coverage 99.88% 99.88% ======================================== Files 119 119 Lines 5414 5414 Branches 616 616 ======================================== Hits 5408 5408 Misses 2 2 Partials 4 4 

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