My aim is:
domain.com/folder
rewrite ->
domain.com
this shall concern ALL links inside that site. I mean
You can use this rule to "remove" the folder from the URL when it is accessed directly via the browser:
RewriteCond %{THE_REQUEST} \ /wedgiecommunity/ RewriteRule ^wedgiecommunity/(.*)$ /$1 [L,R=301]
Then your other rule will handle the rest.