Add associative tables

You can't run from it

src/app/database/migrations/2025-02-19_18-46-48_create_albumsongs.zig

@@ -0,0 +1,20 @@
+const std = @import("std");
+const jetquery = @import("jetquery");
+const t = jetquery.schema.table;
+
+pub fn up(repo: anytype) !void {
+    try repo.createTable(
+        "Albumsongs",
+        &.{
+            t.primaryKey("id", .{}),
+            t.column("album_id", .integer, .{}),
+            t.column("song_id", .integer, .{}),
+            t.timestamps(.{}),
+        },
+        .{},
+    );
+}
+
+pub fn down(repo: anytype) !void {
+    try repo.dropTable("Albumsongs", .{});
+}