improve build times by extracting asset opt into its own crate (#3273)

* improve build types by extracing asset opt as a dylib
* dont use dylib, but let regular workspace caching do the heavy lifting
* add prebuild to cli for better lock contention
* hoist deps
* disable slow tests
* re-enable sequential, debug=0 for dev
* use vfs for windows
* dont cache on failure, fix windows vfs caceh
* free disk space re-order
* add clippy + fmt to windows channel
* yoink makefile
* proper rustfmt/clippy on toolchain
* set incremental to zero since cargo-cache disables it

packages/cli-opt/src/image/jpg.rs

@@ -0,0 +1,23 @@
+use image::{DynamicImage, EncodableLayout};
+use std::{
+    io::{BufWriter, Write},
+    path::Path,
+};
+
+pub(crate) fn compress_jpg(image: DynamicImage, output_location: &Path) -> anyhow::Result<()> {
+    let mut comp = mozjpeg::Compress::new(mozjpeg::ColorSpace::JCS_EXT_RGBX);
+    let width = image.width() as usize;
+    let height = image.height() as usize;
+
+    comp.set_size(width, height);
+    let mut comp = comp.start_compress(Vec::new())?; // any io::Write will work
+
+    comp.write_scanlines(image.to_rgba8().as_bytes())?;
+
+    let jpeg_bytes = comp.finish()?;
+
+    let file = std::fs::File::create(output_location)?;
+    let w = &mut BufWriter::new(file);
+    w.write_all(&jpeg_bytes)?;
+    Ok(())
+}