chore(examples): remove 'pnpm-lock.yaml' (#2951)

* chore(examples): remove 'pnpm-lock.yaml'

* chore(.gitignore): add lock file patterns related with 'examples'

* Update package.json

---------

Co-authored-by: Daishi Kato <dai-shi@users.noreply.github.com>

Author: sukvvon

.gitignore

@@ -10,3 +10,7 @@ $RECYCLE.BIN/
 coverage/
 .rpt2_cache/
 .idea
+examples/**/*/package-lock.json
+examples/**/*/yarn.lock
+examples/**/*/pnpm-lock.yaml
+examples/**/*/bun.lockb

examples/demo/package.json

@@ -13,7 +13,6 @@
     "semi": false,
     "singleQuote": true
   },
-  "packageManager": "pnpm@8.15.0",
   "dependencies": {
     "@react-three/drei": "^9.78.2",
     "@react-three/fiber": "^8.13.7",