chore: Move everything into package/ (#1745)

* Move everything into package

* Remove .DS_Store

* Move scripts and eslintrc to package

* Create CODE_OF_CONDUCT.md

* fix some links

* Update all links (I think)

* Update generated docs

* Update notice-yarn-changes.yml

* Update validate-android.yml

* Update validate-cpp.yml

* Delete notice-yarn-changes.yml

* Update validate-cpp.yml

* Update validate-cpp.yml

* Update validate-js.yml

* Update validate-cpp.yml

* Update validate-cpp.yml

* wrong c++ style

* Revert "wrong c++ style"

This reverts commit 55a3575589c6f13f8b05134d83384f55e0601ab2.

.github/workflows/validate-android.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: ./android
+        working-directory: ./package/android
     steps:
       - uses: actions/checkout@v2
       - name: Setup JDK 11