workspace: replace runtime with F722 platform

Cargo.toml

@@ -1,17 +1,19 @@
 [workspace]
 members = [
+    "boards/geprc-f722-v2",
     "boards/kakute-f7-mini-v3",
     "libs/kaptan-actuator",
+    "libs/kaptan-board",
+    "libs/kaptan-data-channel",
     "libs/kaptan-dma",
     "libs/kaptan-drivers",
     "libs/kaptan-i2c",
     "libs/kaptan-mavlink",
-    "libs/kaptan-runtime",
     "libs/kaptan-sensor",
     "libs/kaptan-spi",
-    "libs/kaptan-stm32f7",
     "libs/kaptan-time",
     "libs/kaptan-tx",
+    "platforms/stm32f7",
 ]
 resolver = "2"