Add links to playgrounds doc to other pages

Author: award999

userdocs/userdocs.docc/Articles/Topics/supported-toolchains.md

@@ -17,6 +17,7 @@ Feature                    | Minimum Toolchain Required
 -------------------------- | ------------------------------------- 
 Debugging with `lldb-dap`  | 6.0
 <doc:docc-live-preview>    | 6.2
+<doc:playgrounds>          | 6.3
 
 ## Toolchain Management
 

userdocs/userdocs.docc/userdocs.md

@@ -30,6 +30,7 @@ This extension adds language support for Swift to Visual Studio Code, providing
 - <doc:project-view>
 - <doc:test-explorer>
 - <doc:docc-live-preview>
+- <doc:playgrounds>
 
 ### Advanced