libs/kaptan-sensor: add immutable IMU snapshot

libs/kaptan-sensor/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "kaptan-sensor"
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+version.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+kaptan-time = { path = "../kaptan-time" }