fix: add missing scripts directory to git

- Remove scripts/ from .gitignore
- Add build_and_test.sh for local testing
- Add bump_version.sh for version updates (used by CI)
- Add release.sh and upload_to_pypi.sh for publishing
- Fixes CI error: ./scripts/bump_version.sh: No such file or directory

scripts/release.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+if [ $# -eq 0 ]; then
+    echo "Usage: $0 <version>"
+    echo "Example: $0 0.1.1"
+    exit 1
+fi
+
+VERSION=$1
+
+# Update version
+./scripts/bump_version.sh $VERSION
+
+# Commit and push
+git add . && git commit -m "chore: bump version to $VERSION" && git push
+
+# Create release (triggers CI)
+gh release create v$VERSION --generate-notes