Supertags and fields

Say what a note is with a supertag, and what it has with fields.

• SupertagsApply, remove, rename and recolour. A note can carry several.
• The supertag page and browserWhere a supertag's fields, templates and notes live, and how to browse them all.
• FieldsAdd a named value to a note, edit it in place and fix values that need review.
• The eleven field typesText, number, date, timestamp, checkbox, option, list, tags, note, URL and email.
• Where a field showsPinned, default, optional and hidden: control how much each note displays.
• Defaults and required fieldsStarting values, required fields and the preview of a shared change.
• Extending a supertagOne supertag builds on another and inherits its fields.
• Child templatesNew notes with a supertag arrive with the child notes you set up.
• AutomationsTriggers and buttons on a supertag that act on its notes.