Setup store to hold databases.

src/morethantext/store.rs

@@ -1,9 +1,16 @@
+use super::{Data, Database};
+use std::collections::HashMap;
+
 #[derive(Clone, Debug)]
-pub struct Store;
+pub struct Store {
+    data: HashMap<String, Data<Database>>,
+}
 
 impl Store {
     pub fn new() -> Self {
-        Self {}
+        Self {
+            data: HashMap::new(),
+        }
     }
 
     pub fn list(&self) -> Vec<String> {