Prune obsolete dist artifacts after builds

package.json

@@ -11,9 +11,9 @@
     "demo": "node scripts/serve-demo.mjs",
     "test": "node --test tests/*.test.mjs",
     "verify": "node scripts/verify.mjs",
-    "dist:win": "electron-builder --win nsis portable && node scripts/write-release-checksums.mjs",
-    "dist:linux": "electron-builder --linux AppImage",
-    "dist:mac": "electron-builder --mac dmg",
+    "dist:win": "electron-builder --win nsis portable && node scripts/write-release-checksums.mjs && node scripts/prune-dist.mjs",
+    "dist:linux": "electron-builder --linux AppImage && node scripts/prune-dist.mjs",
+    "dist:mac": "electron-builder --mac dmg && node scripts/prune-dist.mjs",
     "doctor": "node scripts/doctor.mjs",
     "acceptance": "node scripts/acceptance.mjs",
     "connections:check": "electron scripts/validate-installed-connections.cjs",
@@ -52,6 +52,7 @@
       "docs/UPDATING.md",
       "scripts/apply-source-update.ps1",
       "scripts/apply-binary-update.ps1",
+      "scripts/prune-dist.mjs",
       "docs/RELEASE_NOTES_0.4.0.md",
       "docs/LUMAOPS_SERVER_AUDIT.md",
       "docs/SSH_UNRAID_DEPLOYMENT.md",