v0.4 : Several QOL features

[simbleau]

0.4.0

Added

• New svg example
• New lottie example

Changed

• The GitHub repo has migrated into the linebender org: https://github.com/linebender
  • You may need to update your git ref from loopystudios to linebender
• SVG and Lottie features are now feature-gated
  • SVG (.svg) support is now added through a cargo feature svg.
  • Lottie (.json) support is now added through the cargo feature lottie.
  • experimental dotLottie features (LottiePlayer, PlayerTransition, PlayerState) are now feature-gated through the cargo feature experimental-dotLottie. This is only partial support, and a work in progress.
  • Theme is now activated through the lottie feature, as it was only possible to style runtime lotties.
  • VelloAsset.metadata() is no longer available, as it is specific to Lottie. There is now a trait, LottieExt that can be imported to call .metadata() on a Composition instead. This is no longer fallible as a result.
• PlaybackAlphaOverride was removed in favor of an alpha field on VelloAsset.
• LottiePlayer was renamed to DotLottiePlayer.
• Paths to several locations have changed, e.g. bevy_vello::assets -> bevy_vello::integrations

Fixed

• A slow startup delay for lottie assets to begin rendering
• A dotLottie issue where the first frame can jump on web platforms.