Import Lottie and dotLottie files into Friction v1

[pgilfernandez]

Continuing with AI and the idea of importing/exporting new animation file formats and the Lottie exporter, it makes sense to create an importer to be able to edit "baked" Lottie/dotLottie animations within Friction and be able to export them again.

Here are the list of features:

• Added support for importing Lottie animations into a regular Friction project.
• Added support for both .json Lottie files and .lottie dotLottie packages.
• Added a new Import Lottie Animation action in the File menu.
• Added an import dialog that compares the Lottie file with the active Friction scene.
• Added import options for scaling:
  • No scaling
  • Fit width proportionally
  • Fit height proportionally
  • Stretch to scene size
  • Resize the active Friction scene to match the Lottie animation
• Added import options for scene duration:
  • Keep the current scene duration
  • Extend the scene if needed
  • Fit the scene duration to the imported Lottie
• Added grouped and ungrouped import modes.
• Imported Lottie shape layers as editable Friction vector objects.
• Added support for animated shape geometry.
• Added support for fills, strokes, gradients, stroke caps, joins, and dashed strokes.
• Added support for animated rectangle radius and polystar shapes.
• Added support for Lottie path modifiers, including trim paths.
• Added support for layer transforms, opacity, skew, parenting, and visibility ranges.
• Added support for Lottie blend modes.
• Added support for image layers and embedded dotLottie assets.
• Added support for masks and track mattes.
• Added support for basic text layers, animated text content, and text spacing.
• Hidden or unsupported Lottie content is skipped safely during import.

It makes sense to adapt this code to the Friction v1.1 plug-in system, I'm just dropping it here so that we can experiment with it. 😉