diagnose: create a simple to show-off the library

README.md

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+# Error reporting made easy
+
+Diagnose is a small library used to report compiler/interpreter errors in a beautiful yet readable way.
+
+As a great example, here's the output of the last test:
+
+![first example](./assets/real-world-example-unicode.png)
+
+If you do not like unicode characters, or choose to target platforms which cannot output them natively;
+you may alternatively print the whole diagnostic with ASCII characters, like this:
+
+![second example](./assets/real-world-example-ascii.png)
+
+-----------------
+
+Copyright (c) 2021 Mesabloo, all rights reserved.