WPF Rework - Controls

Contributes to #60

- [ ] Controls
- [x] Overview ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/?view=netframeworkdesktop-4.8)) #2011
- [ ] Control content model ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/wpf-content-model?view=netframeworkdesktop-4.8))
- [x] Styles and templates ...
- [ ] Adorners ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/adorners-overview?view=netframeworkdesktop-4.8))
- [ ] Control authoring
- [ ] Overview ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/control-authoring-overview?view=netframeworkdesktop-4.8))
- [ ] Design guidelines ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/guidelines-for-designing-stylable-controls?view=netframeworkdesktop-4.8))
- [ ] Design for visual customization ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/creating-a-control-that-has-a-customizable-appearance?view=netframeworkdesktop-4.8))
- [ ] Controls library
- [ ] Controls by category ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/controls-by-category?view=netframeworkdesktop-4.8))
- [ ] ... each control listed ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/control-library?view=netframeworkdesktop-4.8))
- [ ] ... each control listed ([link](https://docs.microsoft.com/en-us/dotnet/desktop/wpf/controls/control-library?view=netframeworkdesktop-4.8))
- [ ] ...