[API stabilization] Rename ConfigParser to Hocon and migrate to (#914)

Migrate Hocon to a sealed class scheme

Co-authored-by: EdwarDDay <4127904+EdwarDDay@users.noreply.github.com>
diff --git a/settings.gradle b/settings.gradle
index 35a8813..d77868d 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -14,8 +14,8 @@
 include ':kotlinx-serialization-cbor'
 project(':kotlinx-serialization-cbor').projectDir = file('./formats/cbor')
 
-include ':kotlinx-serialization-runtime-configparser'
-project(':kotlinx-serialization-runtime-configparser').projectDir = file('./formats/config')
+include ':kotlinx-serialization-hocon'
+project(':kotlinx-serialization-hocon').projectDir = file('./formats/hocon')
 
 include ':kotlinx-serialization-properties'
 project(':kotlinx-serialization-properties').projectDir = file('./formats/properties')