Make db creation better

sql/words.sql

@@ -0,0 +1,13 @@
+create table words
+(
+    id       INTEGER
+        primary key autoincrement,
+    key      TEXT              not null,
+    value    TEXT              not null,
+    tags     TEXT              not null,
+    more     TEXT,
+    group_id integer default 1 not null
+        constraint words_word_group_id_fk
+            references word_group
+            on update cascade on delete cascade
+);