Added screenshots from itch.io to the README and docs.

This commit solves #135.

README.md

@@ -10,6 +10,12 @@ easy-to-make
 The game is available on Windows, macOS, and Linux, and is being developed with
 the [Godot Engine](https://godotengine.org/).
 
+## Screenshots
+
+<p align="center">
+  <img src="screenshots.jpg" alt="Screenshots from the game" width="800">
+</p>
+
 ## Downloading
 
 <p>

docs/index.rst

@@ -11,6 +11,9 @@ board game simulator! If you're new to the project, feel free to check out the
 :ref:`about-tabletop-club` page. Otherwise, you can use either the table of
 contents, the sidebar, or the search bar to find what you need!
 
+.. image:: ../screenshots.jpg
+   :alt: Screenshots from the game
+
 .. note::
 
    The documentation, as well as the project in general, is open to suggestions