chore: update lerna to v9 (#2658)

Author: maribethb

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [20.x, 22.x, 24.x]
     steps:
       - uses: actions/checkout@v4
 

.prettierignore

@@ -24,3 +24,6 @@ plugins/dev-create/templates/sample-app-ts/*
 
 # Golden test files
 plugins/**/golden/*
+
+/.nx/cache
+/.nx/workspace-data

lerna.json

@@ -4,5 +4,6 @@
   "changelogPreset": {
     "name": "conventionalcommits"
   },
-  "ignoreChanges": ["**/package-lock.json"]
+  "ignoreChanges": ["**/package-lock.json"],
+  "$schema": "node_modules/lerna/schemas/lerna-schema.json"
 }