build: add directory-oriented make workflows

firmware/boards/kakute-f7-mini-v3/Cargo.toml

@@ -13,7 +13,9 @@ kaptan-config = { path = "../../libs/kaptan-config" }
 platform-stm32f7 = { path = "../../platforms/stm32f7" }
 # RTIC's attribute expansion emits absolute `rtic` support paths in the final
 # board crate; the task graph and all RTIC source remain platform-owned.
-rtic = { version = "2.3", default-features = false, features = ["thumbv7-backend"] }
+rtic = { version = "2.3", default-features = false, features = [
+  "thumbv7-backend",
+] }
 
 [[bin]]
 name = "kaptan-kakute-f7-mini-v3"