cvm-rs: merge guac and jpeg libs together into one

doesn't really need to be two seperate libraries. also preperation for other funnies

the build script has been replaced with a much saner justfile which uses much saner "yarn workspace" invocations instead of blindly cding all over the place

cvm-rs/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "cvm-rs"
+description = "Rust utility library for cvmts. Runs all the high performance code"
+version = "0.1.0"
+edition = "2021"
+exclude = ["index.node"]
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+neon = "1"
+
+# Required for JPEG
+once_cell = "1.19.0"
+tokio = { version = "1.38.0", features = [ "rt", "rt-multi-thread" ] }
+turbojpeg-sys = "1.0.0"