Forwarded attributes on functional widgets

Added QoL improvements to styling

Swapped Y-directions. This fixes issues with border_radius not lining up
properly

Renamed to col_between and row_between

See this comment:
https://github.com/StarArawn/kayak_ui/pull/81#discussion_r805115265

Updated readme and fixed some small bugs.

Merge cursor style

Improved Styles

Implemented WidgetProps over the unit type ('()') so that widget's
without the need for props can be defined without them

Methods made pub as they may be useful in certain scenarios

Added StyleProp::select helper method

This also seems to have fixed a bug that caused the textbox to jump when
focused (?)

Fixed crashes when no context existed.