ci: upgrade pnpm/action-setup to v5 and read version from package.json (#1785)

* ci: upgrade pnpm/action-setup to v6 and read version from package.json

Removes hardcoded pnpm version (10.14.0) from all workflows and instead
reads the version from the packageManager field in package.json, so CI
stays in sync with the version used locally.

* ci: update setup-workflow-dev composite action to use pnpm/action-setup@v6

Also removes the pnpm-version input since the action now reads the
version from package.json#packageManager.

* ci: downgrade pnpm/action-setup to v5

v6 installs pnpm 11 RC/beta, which has a regression
(pnpm/pnpm#11264, pnpm/action-setup#225/#227/#228) that causes
'ERR_PNPM_BROKEN_LOCKFILE: expected a single document in the stream'
when the project's packageManager pins a 10.x pnpm version. v5 is the
latest stable release before v6 and supports reading the version from
package.json#packageManager.

Author: TooTallNate

.github/actions/setup-workflow-dev/action.yml

@@ -6,10 +6,6 @@ inputs:
     description: 'Node.js version to use'
     required: false
     default: '22.x'
-  pnpm-version:
-    description: 'pnpm version to use'
-    required: false
-    default: '10.14.0'
   setup-rust:
     description: 'Whether to setup Rust toolchain'
     required: false
@@ -37,9 +33,7 @@ runs:
         toolchain: stable
 
     - name: Setup pnpm
-      uses: pnpm/action-setup@v3
-      with:
-        version: ${{ inputs.pnpm-version }}
+      uses: pnpm/action-setup@v5
 
     - name: Setup Node.js ${{ inputs.node-version }}
       uses: actions/setup-node@v4

.github/workflows/backport.yml

@@ -29,9 +29,7 @@ jobs:
           token: ${{ steps.app-token.outputs.token }}
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js
         uses: actions/setup-node@v4

.github/workflows/debug-windows.yml

@@ -27,9 +27,7 @@ jobs:
           target: wasm32-unknown-unknown
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 22.x
         uses: actions/setup-node@v4

.github/workflows/docs-checks.yml

@@ -26,9 +26,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 22.x
         uses: actions/setup-node@v4
@@ -57,9 +55,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 22.x
         uses: actions/setup-node@v4

.github/workflows/lint.yml

@@ -47,9 +47,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 22.x
         uses: actions/setup-node@v4

.github/workflows/release.yml

@@ -42,9 +42,7 @@ jobs:
           git config user.email "${{ steps.app-token.outputs.app-slug }}[bot]@users.noreply.github.com"
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 24.x
         uses: actions/setup-node@v4

.github/workflows/tests.yml

@@ -160,9 +160,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha || github.sha }}
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 22.x
         uses: actions/setup-node@v4
@@ -601,9 +599,7 @@ jobs:
           target: wasm32-unknown-unknown
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 10.14.0
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js 22.x
         uses: actions/setup-node@v4