Initial release of the package `swole`.
⚠️ This is just a proof-of-concept
Contains the core of the library : `Application`, `Page`, `Skin`, a few `Widget`, and a single working example.
Widgets added
* **`Button`** : Allow to create a button, with a possible callback.
* **`Input`** : Input field. For now, can only create a number input.
* **`Markdown`** : An incomplete widget for markdown. Markdown not supported yet, just plain text.
Examples added
* **`basic_addition.py`** : Most basic, working example for doing addition.
* **`basic_addition_oop.py`** : Same as `basic_addition.py`, but using only OOP interface (no shortcut => more ugly).