ci: upload each binary as separate artifact for easier download

- Split single 'nupst-binaries' artifact into 6 individual artifacts
- Each platform binary now shows as separate downloadable item in UI
- Artifacts: nupst-linux-x64, nupst-linux-arm64, nupst-macos-x64,
  nupst-macos-arm64, nupst-windows-x64.exe, SHA256SUMS.txt

.gitea/workflows/ci.yml

@@ -76,9 +76,44 @@ jobs:
       - name: Compile all platform binaries
         run: bash scripts/compile-all.sh
 
-      - name: Upload binaries as artifacts
+      - name: Upload Linux x64 binary
         uses: actions/upload-artifact@v3
         with:
-          name: nupst-binaries
-          path: dist/binaries/*
+          name: nupst-linux-x64
+          path: dist/binaries/nupst-linux-x64
+          retention-days: 30
+
+      - name: Upload Linux ARM64 binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: nupst-linux-arm64
+          path: dist/binaries/nupst-linux-arm64
+          retention-days: 30
+
+      - name: Upload macOS x64 binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: nupst-macos-x64
+          path: dist/binaries/nupst-macos-x64
+          retention-days: 30
+
+      - name: Upload macOS ARM64 binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: nupst-macos-arm64
+          path: dist/binaries/nupst-macos-arm64
+          retention-days: 30
+
+      - name: Upload Windows x64 binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: nupst-windows-x64.exe
+          path: dist/binaries/nupst-windows-x64.exe
+          retention-days: 30
+
+      - name: Upload SHA256 checksums
+        uses: actions/upload-artifact@v3
+        with:
+          name: SHA256SUMS.txt
+          path: dist/binaries/SHA256SUMS.txt
           retention-days: 30