remove yarn, rename readme

docs/package.json

@@ -1,30 +0,0 @@
-{
-  "name": "@vue-select/docs",
-  "version": "1.0.0",
-  "license": "MIT",
-  "scripts": {
-    "serve": "vuepress dev",
-    "build": "vuepress build",
-    "build:preview": "cross-env DEPLOY_PREVIEW=true vuepress build"
-  },
-  "devDependencies": {
-    "@octokit/graphql": "^4.3.1",
-    "@popperjs/core": "^2.1.0",
-    "@vuepress/plugin-active-header-links": "^1.4.0",
-    "@vuepress/plugin-google-analytics": "^1.4.0",
-    "@vuepress/plugin-nprogress": "^1.4.0",
-    "@vuepress/plugin-pwa": "^1.4.0",
-    "@vuepress/plugin-register-components": "^1.4.0",
-    "@vuepress/plugin-search": "^1.4.0",
-    "axios": "^0.19.2",
-    "cross-env": "^7.0.2",
-    "date-fns": "^2.11.0",
-    "dotenv": "^8.2.0",
-    "fuse.js": "^6.4.0",
-    "gh-pages": "^2.2.0",
-    "octonode": "^0.9.5",
-    "vue": "^2.6.10",
-    "vuepress": "^1.4.0",
-    "vuex": "^3.1.0"
-  }
-}