chore: massive repo reorganization

src/board/mod.rs.j2

@@ -0,0 +1,15 @@
+// @generated by build.rs — DO NOT EDIT
+pub mod traits;
+pub use traits::*;
+
+#[cfg(any(feature = "heltec_v3", feature = "heltec_v4"))]
+mod esp32s3;
+
+cfg_if::cfg_if! {
+    {%- for board in boards %}
+    {% if loop.first %}if{% else %}else if{% endif %} #[cfg(feature = "{{ board }}")] {
+        mod {{ board }};
+        pub use {{ board }}::*;
+    }
+    {%- endfor %}
+}