ci: rename Build SwiftPM workflow to Prebuild macOS Core

Aligns naming with upstream's convention (prebuild-ios-core.yml).
SPM is an implementation detail; the workflow name should describe
what it produces, not how.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Saadnajmi

.github/workflows/microsoft-pr.yml

@@ -138,10 +138,10 @@ jobs:
     permissions: {}
     uses: ./.github/workflows/microsoft-build-rntester.yml
 
-  build-spm:
-    name: "Build SPM"
+  prebuild-macos-core:
+    name: "Prebuild macOS Core"
     permissions: {}
-    uses: ./.github/workflows/microsoft-build-spm.yml
+    uses: ./.github/workflows/microsoft-prebuild-macos-core.yml
 
   test-react-native-macos-init:
     name: "Test react-native-macos init"
@@ -168,7 +168,7 @@ jobs:
       - yarn-constraints
       - javascript-tests
       - build-rntester
-      - build-spm
+      - prebuild-macos-core
       - test-react-native-macos-init
       # - react-native-test-app-integration
     steps:

.github/workflows/microsoft-build-spm.yml …kflows/microsoft-prebuild-macos-core.yml.github/workflows/microsoft-build-spm.yml renamed to .github/workflows/microsoft-prebuild-macos-core.yml .github/workflows/microsoft-build-spm.yml renamed to .github/workflows/microsoft-prebuild-macos-core.yml

@@ -1,4 +1,4 @@
-name: Build SwiftPM
+name: Prebuild macOS Core
 
 on:
   workflow_call:
@@ -245,8 +245,8 @@ jobs:
           path: hermes/destroot
           retention-days: 30
 
-  build-spm:
-    name: "SPM ${{ matrix.platform }}"
+  build:
+    name: "Build ${{ matrix.platform }}"
     needs: [resolve-hermes, assemble-hermes]
     # Run when upstream jobs succeeded or were skipped (cache hit)
     if: ${{ always() && !cancelled() && !failure() }}
@@ -295,14 +295,14 @@ jobs:
         run: |
           echo "prebuilt-Debug" > .build/artifacts/hermes/version.txt
 
-      - name: Setup SPM workspace (using prebuilt Hermes)
+      - name: Setup workspace (using prebuilt Hermes)
         if: steps.cache-slice.outputs.cache-hit != 'true'
         working-directory: packages/react-native
         env:
           HERMES_VERSION: prebuilt
         run: node scripts/ios-prebuild.js -s -f Debug
 
-      - name: Build SPM (${{ matrix.platform }})
+      - name: Build (${{ matrix.platform }})
         if: steps.cache-slice.outputs.cache-hit != 'true'
         working-directory: packages/react-native
         run: node scripts/ios-prebuild.js -b -f Debug -p ${{ matrix.platform }}
@@ -330,7 +330,7 @@ jobs:
 
   compose-xcframework:
     name: "Compose XCFramework (Debug)"
-    needs: [build-spm]
+    needs: [build]
     if: ${{ always() && !cancelled() && !failure() }}
     runs-on: macos-26
     timeout-minutes: 30