Use cargo workspace (which will potentially improve build times

Cargo.toml

@@ -0,0 +1,34 @@
+[workspace]
+members = [
+  "drivers/ahcid",
+  "drivers/bgad",
+  "drivers/e1000d",
+  "drivers/pcid",
+  "drivers/ps2d",
+  "drivers/rtl8168d",
+  "drivers/vesad",
+  "kernel",
+  "programs/acid",
+  "programs/binutils",
+  "programs/contain",
+  "programs/coreutils",
+  "programs/extrautils",
+  "programs/games",
+  "programs/init",
+  "programs/ion",
+  "programs/netutils",
+  "programs/orbutils",
+  "programs/pkgutils",
+  "programs/smith",
+  "programs/tar",
+  "programs/userutils",
+  "schemes/ethernetd",
+  "schemes/example",
+  "schemes/ipd",
+  "schemes/orbital",
+  "schemes/ptyd",
+  "schemes/randd",
+  "schemes/redoxfs",
+  "schemes/tcpd",
+  "schemes/udpd"
+]