fix bugs in demo app

Author: bentomas

formz_demo/src/formz_demo/example/defaults.gleam

@@ -1,5 +1,5 @@
 import formz
-import formz_string/simple
+import formz_string/generator
 import lustre/element
 import nakai
 import nakai/html
@@ -21,7 +21,7 @@ pub fn handle_post(
 }
 
 pub fn format_string_form(form) -> String {
-  simple.generate(form)
+  generator.build(form)
 }
 
 pub fn formatted_string_form_to_string(str) -> String {

formz_demo/src/formz_demo/examples/list_fields.gleam

@@ -1,5 +1,4 @@
 import formz
-
 import formz_string/definition
 import gleam/string
 

formz_demo/src/formz_demo/examples/login.gleam

@@ -1,4 +1,4 @@
-import formz.{named}
+import formz
 import formz_string/definition
 import wisp
 
@@ -12,11 +12,11 @@ pub type User {
 
 pub fn make_form() {
   use username <- formz.required_field(
-    named("username"),
+    formz.named("username"),
     definition.text_field(),
   )
   use password <- formz.required_field(
-    named("password"),
+    formz.named("password"),
     definition.password_field(),
   )
 

formz_demo/src/formz_demo/examples/require_all_the_inputs.gleam

@@ -1,9 +1,9 @@
-import formz.{named}
+import formz
 import formz_string/definition
 import formz_string/widget
 
 pub fn make_form() {
-  use a <- formz.required_field(named("text"), definition.text_field())
+  use a <- formz.required_field(formz.named("text"), definition.text_field())
   use b <- formz.required_field(formz.named("int"), definition.integer_field())
   use c <- formz.required_field(
     formz.named("number"),