Clarify seed project folder structure and files (#7448)
Clarify seed project folder structure and files (#7448)

* Update docfx_getting_started.md

* Tweak

* Fix list render

Co-authored-by: Yufei Huang <8cdf0fc20d241c10a93fd450af79576eb6093449@live.com>
superyyrrzz/docfx,dotnet/docfx,superyyrrzz/docfx,dotnet/docfx,superyyrrzz/docfx,dotnet/docfx