Add lerna

lerna.json

@@ -0,0 +1,8 @@
+{
+  "packages": [
+    "packages/*"
+  ],
+  "npmClient": "yarn",
+  "useWorkspaces": true,
+  "version": "0.2.0-alpha.0"
+}

package.json

@@ -13,7 +13,8 @@
     "watch": "yarn workspace foam-vscode watch"
   },
   "devDependencies": {
-    "all-contributors-cli": "^6.16.1"
+    "all-contributors-cli": "^6.16.1",
+    "lerna": "^3.22.1"
   },
   "engines": {
     "node": ">=10"