Add installation test file

hello-world.py

@@ -0,0 +1,12 @@
+from gdpc import Editor, Block, geometry
+
+editor = Editor(buffering=True)
+
+# Get a block
+block = editor.getBlock((0,48,0))
+
+# Place a block
+editor.placeBlock((448, 92, 515), Block("stone"))
+
+# Build a cube
+geometry.placeCuboid(editor, (458, 92, 488), (468, 99, 471), Block("oak_planks"))