update elixir client docs

website/docs/api/clients/elixir.md

@@ -4,22 +4,38 @@ outline: deep
 
 # Elixir Client
 
-The Elixir client is being developed in [electric-sql/electric-next/pull/38](https://github.com/electric-sql/electric-next/pull/38). At the moment it provides a GenStage producer that can be used to stream a Shape as per:
+We [maintain an Elixir
+client](https://github.com/electric-sql/electric/tree/main/packages/elixir-client)
+that will stream messages from an Electric server.
+
+## Install
+
+You can install it from [Hex](https://hex.pm/electric_client).
+
+## How to use
+
+The client exposes a
+[`stream/3`](https://hexdocs.pm/electric_client/Electric.Client.html#stream/3)
+function that returns an
+[`Enumerable`](https://hexdocs.pm/elixir/Enumerable.html).
 
 ```elixir
-opts = [
-  base_url: "http://...",
-  shape_definition: %Electric.Client.ShapeDefinition{
-    table: "..."
-  }
-]
+Mix.install([:electric_client])
 
-{:ok, pid, stream} = Electric.Client.ShapeStream.stream(opts)
+{:ok, client} = Electric.Client.new(base_url: "http://localhost:3000")
+
+stream = Electric.Client.stream(client, "my_table", where: "something = true")
 
 stream
 |> Stream.each(&IO.inspect/1)
 |> Stream.run()
 ```
 
-See the [shape_stream_test.exs](https://github.com/electric-sql/electric-next/blob/thruflo/elixir-client/elixir_client/test/electric/client/shape_stream_test.exs) for more details.
+It also has an [`Ecto`](https://hexdocs.pm/ecto) integration that will generate
+updates based on an `Ecto` query:
+
+```elixir
+stream = Electric.Client.stream(client, from(t in MyTable, where: t.something == true))
+```
 
+See the [client documentation](https://hexdocs.pm/electric_client) for more details.