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/view/index.ts

@@ -0,0 +1,15 @@
+export * from './primitive';
+export * from './config';
+export * from './context';
+export * from './inline-content';
+export * from './selection';
+export * from './ui';
+
+export { default as WritekitRoot } from './WritekitRoot.vue';
+export type { WritekitRootProps } from './WritekitRoot.vue';
+export { default as WritekitContent } from './WritekitContent.vue';
+export type { WritekitContentProps } from './WritekitContent.vue';
+export { default as BlockView } from './BlockView.vue';
+export type { BlockViewProps } from './BlockView.vue';
+export { default as TextBlockHost } from './TextBlockHost.vue';
+export type { TextBlockHostProps } from './TextBlockHost.vue';