chore: import upstream snapshot with attribution

examples/forms-with-multiple-steps/hidden/finish.sql

@@ -0,0 +1,8 @@
+insert into users (name, email, age) values (:name, :email, :age)
+returning
+    'alert' as component,
+    'Welcome, ' || name || '!' as title,
+    'You are user #' || id || '. [Create a new user](step_1.sql)' as description_md;
+
+select 'list' as component, 'Existing users' as title, 'users' as value;
+select name as title, email as description from users;

examples/forms-with-multiple-steps/hidden/index.sql

@@ -0,0 +1 @@
+select 'redirect' as component, 'step_1.sql' as link;

examples/forms-with-multiple-steps/hidden/step_1.sql

@@ -0,0 +1,7 @@
+select
+    'form' as component,
+    'step_2.sql' as action;
+
+select
+    'name' as name,
+    true as required;

examples/forms-with-multiple-steps/hidden/step_2.sql

@@ -0,0 +1,13 @@
+select
+    'form' as component,
+    'step_3.sql' as action;
+
+select
+    'email' as name,
+    'email' as type,
+    true as required,
+    'you@example.com' as placeholder,
+    'Hey ' || :name || '! what is your email?' as description;
+
+with previous_answers(name, value) as (values ('name', :name))
+select 'hidden' as type, name, value from previous_answers;

examples/forms-with-multiple-steps/hidden/step_3.sql

@@ -0,0 +1,12 @@
+select
+    'form' as component,
+    'finish.sql' as action;
+
+select
+    'age' as name,
+    'number' as type,
+    true as required,
+    'How old are you, ' || :name || '?' as description;
+
+with previous_answers(name, value) as (values ('name', :name), ('email', :email))
+select 'hidden' as type, name, value from previous_answers;