docs code block formatting

`console` type code-block is designed mainly for examples of the console commands with the output.

If it's just a shell script with comments, then `console` only gets in the way - e.g. if you try to select a console code block manually, you won't be able to select comment symbol `#` at the beginning of the command making code unrunnable if you try to copy and run it. I've replaced it with `bash` or `bat` (for Windows) code blocks where `console` wasn't necessary.

I've also removed `$` symbols at the beginning of the commands if it's not a `console` code-block - since otherwise it just breaks "Copy Code Block" because you copy unrunnable code.

src/ifcopenshell-python/docs/ifcdiff.rst

@@ -34,7 +34,7 @@ Source installation
 Here is a minimal example of how to use IfcDiff as a Python module or CLI
 utility:
 
-::
+.. code-block:: console
 
     $ python -m ifcdiff -h
     usage: ifcdiff.py [-h] [-o OUTPUT] [-r RELATIONSHIPS] old new
@@ -72,9 +72,9 @@ Here is a minimal example of how to use IfcDiff as a library:
 
 You can also alias it to a command:
 
-::
+.. code-block:: bash
 
-    $ alias ifcdiff='python -m ifcdiff'
+    alias ifcdiff='python -m ifcdiff'
 
 Using the BlenderBIM Add-on
 ---------------------------