Add a @grafana/runtime package with backendSrv interface (#16533)

grafana-runtime/tsconfig.json imports query to avoid a build error  ¯\_(ツ)_/¯

packages/grafana-runtime/package.json

@@ -0,0 +1,37 @@
+{
+  "name": "@grafana/runtime",
+  "version": "6.0.1-alpha.0",
+  "description": "Grafana Runtime Library",
+  "keywords": [
+    "typescript",
+    "react",
+    "react-component"
+  ],
+  "main": "src/index.ts",
+  "scripts": {
+    "tslint": "tslint -c tslint.json --project tsconfig.json",
+    "typecheck": "tsc --noEmit",
+    "clean": "rimraf ./dist ./compiled",
+    "build": "rollup -c rollup.config.ts"
+  },
+  "author": "Grafana Labs",
+  "license": "Apache-2.0",
+  "dependencies": {
+  },
+  "devDependencies": {
+    "awesome-typescript-loader": "^5.2.1",
+    "lodash": "^4.17.10",
+    "pretty-format": "^24.5.0",
+    "rollup": "1.6.0",
+    "rollup-plugin-commonjs": "9.2.1",
+    "rollup-plugin-node-resolve": "4.0.1",
+    "rollup-plugin-sourcemaps": "0.4.2",
+    "rollup-plugin-terser": "4.0.4",
+    "rollup-plugin-typescript2": "0.19.3",
+    "rollup-plugin-visualizer": "0.9.2",
+    "typescript": "3.4.1"
+  },
+  "resolutions": {
+    "@types/lodash": "4.14.119"
+  }
+}