rename tables

sql/states.sql

@@ -0,0 +1,16 @@
+create table states
+(
+    id          INTEGER
+        primary key autoincrement,
+    word_id     INTEGER           not null
+        references words
+            on delete cascade,
+    set_id      INTEGER              not null
+        references decks
+            on delete cascade,
+    score       INTEGER default 1 not null,
+    last_opened INTEGER           not null,
+    fsrs_opened INTEGER not null,
+    fsrs_memory INTEGER not null,
+    fsrs_open_day INTEGER not null
+);