ifctester docs for command line use

src/ifctester/README.md

@@ -4,6 +4,22 @@ With **IfcTester**, you can author and read **Information Delivery Specification
 
 ## How to use it
 
+### Command line use
+
+.. code-block:: bash
+
+    # run console reporter
+    python -m ifctester example.ids example.ifc
+    python -m ifctester example.ids example.ifc -r Html -o report.html
+
+Available flags:
+
+- ``-r`` / ``--reporter``: The reporting method to view audit results. Availabe reporters: Console, Txt, Json, Html, Ods, Bcf
+- ``--no-color``: Disable colour output (supported by Console reporting).
+- ``-o`` / ``--output``: Output file (supported for all types of reporting except Console).
+
+### Code example
+
 ```python
 import ifcopenshell
 from ifctester import ids, reporter