refactor(firmware): centralize configuration and diagnostics

firmware/libs/kaptan-config-derive/tests/ui/unsupported_default.stderr

@@ -0,0 +1,5 @@
+error: supported field config rules are id, key, unit, enum, finite, nonzero, and range
+ --> tests/ui/unsupported_default.rs:5:53
+  |
+5 |     #[config(id = 1, key = "value", unit = "count", default = 1)]
+  |                                                     ^^^^^^^