Update PyPI badge and README formatting

Modified the PyPI version badge URL in the CI workflow and README to simplify the URL. Enhanced README with emojis for better visual appeal and added detailed installation instructions for standalone binaries.

.github/workflows/ci.yml

@@ -341,7 +341,7 @@ jobs:
           # Update PyPI version badge in README.md
           if [ -f "README.md" ]; then
             # Replace PyPI version badge
-            sed -i 's|https://img.shields.io/pypi/v/tzst[^)]*|https://img.shields.io/pypi/v/tzst?label=PyPI\&color=blue|g' README.md || true
+            sed -i 's|https://img.shields.io/pypi/v/tzst[^)]*|https://img.shields.io/pypi/v/tzst|g' README.md || true
             # Update version in badge alt text if exists
             sed -i 's|PyPI - Version[^]]*|PyPI - Version|g' README.md || true
           fi