add peripherals module which has shared state of all peripherals

src/peripherals/storage/store.rs

@@ -0,0 +1,7 @@
+use crate::peripherals::storage::cardstore::CardStore;
+use crate::peripherals::storage::flash_store::FlashStore;
+
+pub struct Store {
+    pub flash_store: &'static FlashStore,
+    pub card_store: CardStore,
+}