Experimenting with some new ways to handle config

For now I’ve chucked it on Flarum\Core as a static method, but
ultimately I think we will need a ConfigRepository abstraction (whether
it replaces or sits underneath the Flarum\Core static method I’m not
sure).

Also starting to think about multisite scenarios, I think this is
important. The Forum model could actually end up with a database table
behind it, and each forum would have its own config settings? Haven’t
really thought about it too hard yet…

src/Support/Extensions/ExtensionsServiceProvider.php

@@ -18,7 +18,7 @@ class ExtensionsServiceProvider extends ServiceProvider
             return;
         }
 
-        $extensions = json_decode(DB::table('config')->where('key', 'extensions_enabled')->pluck('value'), true);
+        $extensions = json_decode(Core::config('extensions_enabled'), true);
         $providers = [];
 
         foreach ($extensions as $extension) {