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

Cargo.lock

@@ -453,6 +453,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
 dependencies = [
  "clap_builder",
+ "clap_derive",
 ]
 
 [[package]]
@@ -468,6 +469,18 @@ dependencies = [
  "terminal_size",
 ]
 
+[[package]]
+name = "clap_derive"
+version = "4.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2ce8604710f6733aa641a2b3731eaa1e8b3d9973d5e3565da11800813f997a9"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "clap_lex"
 version = "1.1.0"
@@ -1554,6 +1567,21 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "offload_daemon"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "env_logger",
+ "libc",
+ "log",
+ "serde_json",
+ "thiserror",
+ "vm-migration",
+ "vmm",
+ "vmm-sys-util",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.4"