[feat] extend database schema with new tables and indexes

database/main/ranged_weapon.sql

@@ -0,0 +1,18 @@
+create table ranged_weapon
+(
+    id                   INTEGER
+        primary key,
+    item_id              INTEGER not null
+        unique
+        references item
+            on delete cascade,
+    kampftechnik_id      INTEGER not null
+        references kampftechnik
+            on delete restrict,
+    schaden_tp_formel    TEXT    not null,
+    ladezeit_in_aktionen INTEGER,
+    reichweite_nah       INTEGER,
+    reichweite_mittel    INTEGER,
+    reichweite_fern      INTEGER
+);
+