Add a basic README.

common/test/predictive-text/README.md

@@ -0,0 +1,40 @@
+Predictive Text testing CLI
+---------------------------
+
+Provides a command line interface to try out predictive text models.
+
+Install
+-------
+
+**NOTE**: Requires Node >= 10.0
+
+Install dependencies with `npm`:
+
+    npm install 
+
+Usage
+-----
+
+Start it like so:
+
+    $ node .
+
+You will be presented with a prompt. Type any phrase in the model's
+language. Press <kbd>Tab</kbd> to start choosing a prediction. Press the
+left and right arrow keys to go through suggestions. Press
+<kbd>Enter</kbd> to select the given suggestion. Press <kbd>Esc</kbd>.
+
+Press <kbd>Ctrl</kbd>+D or <kbd>Ctrl</kbd>+C to quit.
+
+    > He
+    [ Hello ] [ Hey ] [ He he ]
+
+
+ROADMAP
+-------
+
+ * The command line interface!
+ * \-f _filename_ to load a model from a file
+ * `LMPATH` environment variable to load a named model by id: e.g,.
+   `node . example.crk.wordlist` will load the given model,
+   provided `LMPATH` is defined.