(chore): implement motion system

[epetrow]

Closes: https://github.com/telerik/kendo-themes-private/issues/103

Below is a short breakdown of the motion system implementation and how it works:

1. Motion Durations and Easings:

• $_default-motion-durations: Defines a map of motion duration tokens with, each associated with a specific duration in seconds.

• $_default-motion-easings: Defines a map of motion easing tokens (timing functions), each associated with a cubic-bezier function.

• $kendo-motion-durations and $kendo-motion-easings: These variables store the default motion durations and easings, but can be customized by the user.

2. k-motion:

• Accepts a duration, timing function, and a list of properties.

• Generates a CSS transition property for each property with the specified duration and timing function.

• Checks if transitions are enabled ( $kendo-enable-transitions), if not sets transition-duration to 0s.

3. kendo-motion:

• Uses the k-motion function to generate the transition property for a set of CSS properties.

4. Usage:

• Motion durations and easings can be customized by overriding or defining values for $kendo-motion-durations and $kendo-motion-easings variables.

• Applying transitions to specific properties. For example:

.element {
  @include kendo-motion('short-1', 'ease-in-out', opacity, transform);
}

[inikolova]

Please rename all commits implement motion system and i_ntegrate motion system_ per theme to feat, not chore.(Also remove the WIP).