Add client completion type for remaining joined strings (#2595)

Author: MrSlimeDiamond

src/main/java/org/spongepowered/api/command/parameter/managed/clientcompletion/ClientCompletionTypes.java

@@ -66,6 +66,12 @@ public final class ClientCompletionTypes {
      */
     public static final DefaultedRegistryReference<ClientCompletionType> NONE = ClientCompletionTypes.key(ResourceKey.sponge("none"));
 
+    /**
+     * Indicates to the client that the {@link ValueParser} is a greedy
+     * string.
+     */
+    public static final DefaultedRegistryReference<ClientCompletionType> REMAINING_JOINED_STRINGS = ClientCompletionTypes.key(ResourceKey.sponge("remaining_joined_strings"));
+
     /**
      * Indicates to the client that the {@link ValueParser} is a
      * {@link ResourceKey}.