breaking: New annotation plugin replaces others

This wraps up the initial work on a new annotations plugin that replaces
other plugins that provide annotations. As a result, the following
plugins are now no longer available:

- plugin-banner
- plugin-bartack
- plugin-buttons
- plugin-cutonfold
- plugin-dimension
- plugin-grainine
- plugin-logo
- plugin-notches
- plugin-scalebox
- plugin-title

The new plugin-annotations package provides all these plugins used to
provide. In addition, it also includes the following new macros:

- bannerbox
- pleat
- sewTogether

plugins/plugin-annotations/src/logo.mjs

@@ -5,8 +5,8 @@ const logo = (scale) =>
 export const logoHooks = {
   preRender: [
     function (svg) {
-      if (svg.defs.indexOf('id="logo"') === -1) {
-        svg.defs += logo(svg.pattern.settings[0].scale)
+      for (const def of svg.defs) {
+        if (svg.defs.indexOf('id="logo"') === -1) svg.defs += logo(svg.pattern.settings[0].scale)
       }
     },
   ],