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/tsconfig.src.json

@@ -0,0 +1,12 @@
+{
+  "extends": "@robonen/tsconfig/tsconfig.vue.json",
+  "compilerOptions": {
+    "composite": true,
+    "types": [],
+    "paths": {
+      "@/*": ["./src/*"]
+    },
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.src.tsbuildinfo"
+  },
+  "include": ["src/**/*.ts", "src/**/*.vue"]
+}