Migrate from pnpm to Yarn Berry (PnP), add OIDC trusted publishing

Author: mgabor3141

.changeset/sour-parks-mate.md

@@ -5,4 +5,4 @@
 "pi-safeguard": patch
 ---
 
-Documentation updates
+Clean up package metadata, migrate to Yarn Berry

.github/workflows/ci.yml

@@ -12,17 +12,17 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: pnpm/action-setup@v4
+      - run: corepack enable
 
       - uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: pnpm
+          cache: yarn
 
-      - run: pnpm install --frozen-lockfile
+      - run: yarn install --immutable
 
-      - run: pnpm lint
+      - run: yarn lint
 
-      - run: pnpm build
+      - run: yarn build
 
-      - run: pnpm test
+      - run: yarn test

.github/workflows/release.yml

@@ -16,21 +16,21 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: pnpm/action-setup@v4
+      - run: corepack enable
 
       - uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: pnpm
-          registry-url: https://registry.npmjs.org
+          cache: yarn
 
-      - run: pnpm install --frozen-lockfile
+      - run: yarn install --immutable
 
-      - run: pnpm build
+      - run: yarn build
 
       - uses: changesets/action@v1
         with:
-          publish: pnpm release
+          version: yarn ci:version
+          publish: yarn ci:publish
           title: "Version Packages"
           commit: "Version Packages"
         env:

.gitignore

@@ -1,3 +1,12 @@
-node_modules/
 dist/
 *.tsbuildinfo
+.vitest/
+
+# Yarn PnP
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions