Add snapshots crate

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

Cargo.toml

@@ -3,5 +3,6 @@ members = [
     "crates/client",
     "crates/logging",
     "crates/shim-client",
-    "crates/shim"
+    "crates/shim",
+    "crates/snapshots"
 ]

crates/snapshots/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "containerd-snapshots"
+version = "0.1.0"
+authors = ["Maksym Pavlenko <pavlenko.maksym@gmail.com>"]
+edition = "2018"
+license = "Apache-2.0"
+repository = "https://github.com/containerd/rust-extensions"
+homepage = "https://containerd.io"
+
+[dependencies]

crates/snapshots/src/lib.rs

@@ -0,0 +1,7 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}