refactor: move firmware workspace under firmware

firmware/libs/kaptan-config-derive/tests/ui/default_below_minimum.rs

@@ -0,0 +1,9 @@
+use kaptan_config_derive::ConfigValidate;
+
+#[derive(ConfigValidate)]
+struct DefaultBelowMinimum {
+    #[config(id = 1, key = "value", unit = "count", default = 1, range(min = 2, max = 3))]
+    value: u32,
+}
+
+fn main() {}