* Update Roadmap.md
Roadmap updated in accordance with the internal document
* Fix markdown issues in Roadmap
Add Roadmap.md to markdownlint check in CI
* Change name of Roadmap file to capital letters
It's more tradiotonal to name info files in uppercase
See:
https://softwareengineering.stackexchange.com/a/301708/359643
Co-authored-by: Pavel Lobashov <shockwavenn@gmail.com>
