Use field components without forms

Field components no longer have to be wrapped in a Form component to work. When used without a form, they provide a global binding of their value.

Almost all field types support this usage, except attachments (single and multiple), signatures, and relationship pickers, which must be bound to a datasource to function.

A couple of things to note:

• The field setting is now optional for standalone fields. Instead, the component name will be used to generate the global binding.
• All settings, such as validation, default values, and on-change actions, continue to function as expected.