Move to monorepo (jaredpalmer#2102)

* Lerna, stub formik-native

* Fix test command

* Move now.json into the root so docs can deploy

* Symlink the root readme for now

* Symlink migration guide

* Add lerna bootstrap to postinstall

* Specify multiple packages in codesandbox ci

* Fix now builds

* Remove codesandbox build command

* Fix both CS and Now build commands

* Pass test flags through to tsdx packages

* Fix gitignore

.codesandbox/ci.json

@@ -1,4 +1,5 @@
 {
   "sandboxes": ["ooh2y"],
-  "buildCommand": "build" 
+  "buildCommand": "build",
+  "packages": ["packages/formik", "packages/formik-native"]
 }

.gitignore

@@ -1,4 +1,3 @@
-node_modules
 dist
 compiled
 *.log
@@ -8,19 +7,14 @@ next.d.ts
 legacy.d.ts
 .idea
 *.orig
-.DS_Store
 
 node_modules
-
-lib/core/metadata.js
-lib/core/MetadataBlog.js
+package-lock.json
+yarn.lock
+!/yarn.lock
 
 website/translated_docs
 website/build/
 website/yarn.lock
 website/node_modules
 website/i18n/*
-.rts2_cache_es
-.rts2_cache_esm
-.rts2_cache_cjs
-.rts2_cache_umd