adding iter_from to multi store

.gitignore

@@ -2,3 +2,4 @@
 target/
 **/*.rs.bk
 Cargo.lock
+.vscode/

src/store/multi.rs

@@ -105,6 +105,23 @@ where
         Ok(res)
     }
 
+    /// Provides a cursor to all of the values starting at key or after
+    pub fn iter_from<'r, R, I, C, K>(&self, reader: &'r R, k: K) -> Result<Iter<'r, I>, StoreError>
+    where
+        R: Readable<'r, Database = D, RoCursor = C>,
+        I: BackendIter<'r>,
+        C: BackendRoCursor<'r, Iter = I>,
+        K: AsRef<[u8]> + 'r,
+    {
+        let cursor = reader.open_ro_cursor(&self.db)?;
+        let iter = cursor.into_iter_from(k);
+
+        Ok(Iter {
+            iter,
+            phantom: PhantomData,
+        })
+    }
+
     /// Provides the first value that matches this key
     pub fn get_first<'r, R, K>(&self, reader: &'r R, k: K) -> Result<Option<Value<'r>>, StoreError>
     where