Add "record" functionality to animate only attributes that have been changed

[imvenx]

Right now the only way to animate in inka is to press "create keyframes" button, that creates keyframes of the whole svg three and all attributes. That is ok for example to create a starting point and an end point of the animation that are the same and then loop that animation, but for almost any other situation would be better to just record the actual attribute that has changed and nothing else.

If "Record" button is pressed, it is going to emit a red/white switching light to remind the user that this option is activated, and every time the user changes something on inkscape (on input) that attribute change is going to be recorded as a keyframe.

[imvenx]

Idea:
Add option to "move forward on record" that allows the user to set a step to advance the timeline everytime a kf is recorder, so for example a user changes color and is recorded, the timeline moves 0.5 seconds forward, the user sets another color, and again the timeline moves forward 0.5 seconds.