chore: import upstream snapshot with attribution

examples/forms with a variable number of fields/sqlpage/migrations/0000_schema.sql

@@ -0,0 +1,21 @@
+CREATE TABLE products (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name VARCHAR(255) NOT NULL,
+    price DECIMAL(10, 2) NOT NULL
+);
+
+CREATE TABLE orders (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    customer_name VARCHAR(255) NOT NULL,
+    customer_email VARCHAR(255) NOT NULL,
+    date_created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE order_items (
+    order_id INTEGER NOT NULL,
+    product_id INTEGER NOT NULL,
+    quantity INTEGER NOT NULL,
+    FOREIGN KEY (order_id) REFERENCES orders (id),
+    FOREIGN KEY (product_id) REFERENCES products (id),
+    PRIMARY KEY (order_id, product_id)
+);

examples/forms with a variable number of fields/sqlpage/migrations/0001_initial_products.sql

@@ -0,0 +1,6 @@
+-- Insert statements to populate the 'products' table with unusual products
+INSERT INTO products (name, price) VALUES ('Invisible Umbrella', 99.99);
+INSERT INTO products (name, price) VALUES ('Silent Alarm Clock', 49.95);
+INSERT INTO products (name, price) VALUES ('Pet Rock 2.0', 19.99);
+INSERT INTO products (name, price) VALUES ('Chocolate Teapot', 39.99);
+INSERT INTO products (name, price) VALUES ('Square Wheels for Your Bicycle', 29.99);