offload_daemon: Introduce a reference implementation

Adding a new dedicated binary that is meant to be used as a reference
implementation for validating that offloaded snapshot/restore works and
meant to be used through tests in general.

Signed-off-by: Sebastien Boeuf <sboeuf@meta.com>
Assisted-by: Claude:claude-opus-4-7

offload_daemon/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+authors = ["The Cloud Hypervisor Authors"]
+edition.workspace = true
+name = "offload_daemon"
+rust-version.workspace = true
+version = "0.1.0"
+
+[dependencies]
+clap = { workspace = true, features = ["derive"] }
+env_logger = { workspace = true }
+libc = { workspace = true }
+log = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+vm-migration = { path = "../vm-migration" }
+vmm = { path = "../vmm" }
+vmm-sys-util = { workspace = true }
+
+[features]
+default = ["kvm"]
+kvm = ["vmm/kvm"]
+mshv = ["vmm/mshv"]
+
+[lints]
+workspace = true