Workspace skeleton for plugins: sausage-vfs, sausage-interface, sausage-plugin, sausage-plugin-macros

The agent leaves the workspace until it is rewritten on the new SDK.

Cargo.toml

@@ -1,10 +1,11 @@
 [workspace]
 resolver = "3"
-members = ["cli", "agent", "sdk"]
+members = ["cli", "vfs", "interface", "sdk", "sdk/macros"]
 default-members = ["cli"]
-exclude = ["examples"]
+# The agent is rewritten on top of the new SDK. Until then it is not a member.
+exclude = ["examples", "agent"]
 
 # Wasmtime compiles components with Cranelift. Optimize dependencies in dev
-# builds, so that tests and debug runs start actors quickly.
+# builds, so that tests and debug runs start plugins quickly.
 [profile.dev.package."*"]
 opt-level = 2