large rewrite to make mize run on every platform

src/core/instance/store.rs

@@ -0,0 +1,27 @@
+use crate::error::MizeResult;
+use crate::item::{Item, ItemData};
+use crate::id::MizeId;
+
+pub trait Store {
+    // should have the ability to be multi threaded, if the underlying implementation supports 
+    // multithreaded IO operations
+    // for now all refs to a store hold a Mutex but this mutex is part of where the MizeStore trait
+    // is implemented, so that there can be a multithreaded implementation
+    //fn get(self, id: MizeId) -> MizeResult<Item<Self>> where Self: Sized;
+
+    fn set<T: Into<ItemData>>(self, id: MizeId, data: T) -> MizeResult<()>;
+
+    // in the future should implement transactions, ....
+
+    // funcs to do with links, backlinks
+    fn get_links(self, item: Item<Self>) -> MizeResult<Vec<MizeId>> where Self: Sized;
+
+    fn get_backlinks(self, item: Item<Self>) -> MizeResult<Vec<MizeId>> where Self: Sized;
+
+    fn new_id(&self) -> MizeResult<MizeId>;
+}
+
+/// references an item that is stored in a store
+pub trait StoreRef {
+    // do we need this or is this basically an item
+}