Helps: SkSL-based shader warmup #53607

This would allow developers to prepare SkSL shader warm-up artifacts inside IDE without having to use the command line.

Needs:

• Connect flutter tools to VM service callback to pull sksl files from device Connect flutter tools to VM service callback to pull sksl files from device #53116
• Add support for --sksl-shader-warmup to package sksl files into flutter_assets Add support for --sksl-shader-warmup to package sksl files into flutter_assets #53115