chore: Upgrade to Yarn 3+

.gitignore

@@ -4,17 +4,35 @@
 # or operating system, you probably want to add a global ignore instead:
 #   git config --global core.excludesfile '~/.gitignore_global'
 
-# Ignore bundler config.
+# Ignore bundler config
 /.bundle
 
-# Ignore all logfiles and tempfiles.
+# Ignore all logfiles and tempfiles
 /log/*
+/tmp/*
 !/log/.keep
-/tmp
-/spec/examples.txt
+!/tmp/.keep
+
+# Ignore pidfiles, but keep the directory
+/tmp/pids/*
+!/tmp/pids/
+!/tmp/pids/.keep
+
+# Ignore local build artifacts
+/coverage
+/deploy
+/node_modules
 /public/assets
+/spec/examples.txt
+
+# Ignore node modules and PNP
+/.pnp.*
+/.yarn/*
 /node_modules
-/deploy
+!/.yarn/patches
+!/.yarn/plugins
+!/.yarn/sdks
+!/.yarn/versions
 
 # Ignore env-overrides for configs
 config/hutch.*.yml

.yarnrc.yml

@@ -0,0 +1,3 @@
+# vim: ft=yaml
+
+nodeLinker: node-modules

package.json

@@ -44,5 +44,10 @@
   },
   "browserslist": [
     "last 1 chrome versions"
-  ]
+  ],
+  "engines": {
+    "node": "^18.0",
+    "yarn": "3.6.1"
+  },
+  "packageManager": "[email protected]"
 }