feature/mount-filter-node-api (#181)

* started working on filter mount

* fixes

* fix indentation

* fixes

* save

* change

* rm

* Update waku_types.nim

* Update waku_filter.nim

* fixes

* fix

* using new filter

* did some testing stuff

* rm

* fix

* updated

* update doc

* fix

* fix

* unasynced

* fix

* w -> node

* rename

* move to content filter

* fix

* method

* rename

* renamed contentFilter -> contentFilters

* readded

* moved

* first test fix

* readded

* no more need

* fixes

* fix

* fix

* fixes

* todo

* removes mother fuck

* Update waku_types.nim

docs/api/v2/node.md

@@ -25,14 +25,11 @@ method subscribe*(w: WakuNode, topic: Topic, handler: TopicHandler)
   ## NOTE The data field SHOULD be decoded as a WakuMessage.
   ## Status: Implemented.
 
-method subscribe*(w: WakuNode, contentFilter: ContentFilter, handler: ContentFilterHandler)
-  ## Subscribes to a ContentFilter. Triggers handler when receiving messages on
-  ## this content filter. ContentFilter is a method that takes some content
-  ## filter, specifically with `ContentTopic`, and a `Message`. The `Message`
-  ## has to match the `ContentTopic`.
-
-  ## Status: Not yet implemented.
-  ## TODO Implement as wrapper around `waku_filter` and `subscribe` above.
+method subscribe*(w: WakuNode, filter: FilterRequest, handler: ContentFilterHandler)
+  ## Registers for messages that match a specific filter. Triggers the handler whenever a message is received.
+  ## FilterHandler is a method that takes a MessagePush.
+  ##
+  ## Status: Implemented.
 
 method unsubscribe*(w: WakuNode, topic: Topic)
   ## Unsubscribe from a topic.