libs/kaptan-i2c: add non-blocking controller contract

Cargo.lock

@@ -147,11 +147,16 @@ version = "0.1.0"
 name = "kaptan-drivers"
 version = "0.1.0"
 dependencies = [
+ "kaptan-i2c",
  "kaptan-sensor",
  "kaptan-spi",
  "kaptan-time",
 ]
 
+[[package]]
+name = "kaptan-i2c"
+version = "0.1.0"
+
 [[package]]
 name = "kaptan-kakute-f7-mini-v3"
 version = "0.1.0"
@@ -188,6 +193,7 @@ name = "kaptan-runtime"
 version = "0.1.0"
 dependencies = [
  "kaptan-drivers",
+ "kaptan-i2c",
  "kaptan-sensor",
  "kaptan-spi",
  "kaptan-time",
@@ -210,6 +216,7 @@ version = "0.1.0"
 dependencies = [
  "cortex-m",
  "kaptan-dma",
+ "kaptan-i2c",
  "kaptan-spi",
  "kaptan-time",
  "stm32f7",