[NextJS] Move LayoutService to sitecore-jss package (#511)

* Move LayoutService to sitecore-jss

* Add package-lock

* Move headers logic to sitecore-jss

* extract headers handlers

* Revert link

* Changes after review

* Format

* Add data fetcher resolver

* Make fetchRouteData, fetchPlaceholderData as deprecated, add fetchPlaceholderData to LayoutService

* Update jsdoc

* Refactor DataFetcherResolver generic

package.json

@@ -3,8 +3,8 @@
     "reset": "lerna clean --yes && npm run bootstrap && npm run build-packages",
     "bootstrap": "lerna bootstrap && npm run bootstrap-nextjs-sample && npm run bootstrap-react-sample",
     "bootstrap:ci": "lerna bootstrap --ci",
-    "bootstrap-nextjs-sample": "cd ./samples/nextjs/node_modules/@sitecore-jss/sitecore-jss-nextjs && npm link ../../react && npm link ../../react-dom",
-    "bootstrap-react-sample": "cd ./samples/react/node_modules/@sitecore-jss/sitecore-jss-react && npm link ../../react && npm link ../../react-dom",
+    "bootstrap-nextjs-sample": "cd ./samples/nextjs/node_modules/@sitecore-jss/sitecore-jss-nextjs && npm link ../../react && cd ../sitecore-jss-nextjs-editing-host && npm link ../../react",
+    "bootstrap-react-sample": "cd ./samples/react/node_modules/@sitecore-jss/sitecore-jss-react && npm link ../../react",
     "build-packages": "lerna run build --ignore *-sample*",
     "build-apps": "lerna run build --scope *-sample*",
     "lint-packages": "lerna run lint --scope @sitecore-jss/sitecore-jss-nextjs",

packages/sitecore-jss-nextjs/src/index.ts

@@ -3,6 +3,8 @@ export {
   mediaApi,
   isExperienceEditorActive,
   resetExperienceEditorChromes,
+  AxiosDataFetcher,
+  LayoutService,
   DictionaryPhrases,
   DictionaryServiceData,
   LayoutServiceData,