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/eslint.config.ts

@@ -0,0 +1,9 @@
+import { base, compose, imports, stylistic, tests, typescript, vue } from '@robonen/eslint';
+
+export default compose(base, typescript, vue, imports, stylistic, {
+  name: 'writekit/overrides',
+  files: ['**/*.vue'],
+  rules: {
+    '@stylistic/no-multiple-empty-lines': 'off',
+  },
+}, tests);