Bundle Lib directory in GitHub releases (#6497)

* Initial plan

* Add Lib directory archives to release workflow

Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>

* Add release notes explaining users need both binary and Lib archive

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* Remove unnecessary --notes-start-tag parameter

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* Only create zip archive, remove tar.gz

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---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>

.github/workflows/release.yml

@@ -144,6 +144,8 @@ jobs:
     if: ${{ github.repository == 'RustPython/RustPython' || github.event_name != 'schedule' }}
     needs: [build, build-wasm]
     steps:
+      - uses: actions/checkout@v6.0.1
+
       - name: Download Binary Artifacts
         uses: actions/download-artifact@v7.0.0
         with:
@@ -151,6 +153,10 @@ jobs:
           pattern: rustpython-*
           merge-multiple: true
 
+      - name: Create Lib Archive
+        run: |
+          zip -r bin/rustpython-lib.zip Lib/
+
       - name: List Binaries
         run: |
           ls -lah bin/
@@ -174,6 +180,7 @@ jobs:
               --repo="$GITHUB_REPOSITORY" \
               --title="RustPython $RELEASE_TYPE_NAME $today-$tag #$run" \
               --target="$tag" \
+              --notes "⚠️ **Important**: To run RustPython, you must download both the binary for your platform AND the \`rustpython-lib.zip\` archive. Extract the Lib directory from the archive to the same location as the binary, or set the \`RUSTPYTHONPATH\` environment variable to point to the Lib directory." \
               --generate-notes \
               $PRERELEASE_ARG \
               bin/rustpython-release-*