feat(writekit): rename @robonen/editor to @robonen/writekit

Rename the rich-text editor package and all Editor* exports to Writekit*;
remove the old vue/editor tree.

vue/writekit/src/blocks/divider.ts

@@ -0,0 +1,14 @@
+import { defineBlock } from '../registry';
+import DividerBlock from './DividerBlock.vue';
+
+export const divider = defineBlock({
+  type: 'divider',
+  spec: {
+    content: { kind: 'atom' },
+    group: 'block',
+    toDOM: () => ['hr'],
+    parseDOM: [{ tag: 'hr' }],
+  },
+  component: DividerBlock,
+  meta: { title: 'Divider', icon: 'minus', keywords: ['divider', 'hr', 'rule', 'separator'], group: 'media' },
+});