Generate docs (#13)

Fixes #12

docs/.pages

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+title: API Reference
+nav:
+    - Overview: README.md
+    - ...

docs/README.md

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+<!-- markdownlint-disable -->
+
+# API Overview
+
+## Modules
+
+- [`maybe`](./maybe.md#module-maybe)
+
+## Classes
+
+- [`maybe.Nothing`](./maybe.md#class-nothing): An object that indicates no inner value is present
+- [`maybe.Some`](./maybe.md#class-some): An object that indicates some inner value is present
+- [`maybe.UnwrapError`](./maybe.md#class-unwraperror): Exception raised from ``.unwrap_<...>`` and ``.expect_<...>`` calls.
+
+## Functions
+
+- [`maybe.is_nothing`](./maybe.md#function-is_nothing): A typeguard to check if a maybe is a `Nothing`.
+- [`maybe.is_some`](./maybe.md#function-is_some): A typeguard to check if a maybe is a `Some`.
+
+
+---
+
+_This file was automatically generated via [lazydocs](https://github.com/ml-tooling/lazydocs)._