Add PyPI badge and link

- Add version badge to README linking to PyPI
- Add PyPI URL to project.urls metadata

Author: nrempel

README.md

@@ -1,5 +1,7 @@
 # Earnings Feed Python SDK
 
+[![PyPI](https://img.shields.io/pypi/v/earningsfeed)](https://pypi.org/project/earningsfeed/)
+
 Official Python client for the [Earnings Feed API](https://earningsfeed.com/api) — SEC filings, insider transactions, and institutional holdings.
 
 ## Installation

pyproject.toml

@@ -60,6 +60,7 @@ Homepage = "https://earningsfeed.com"
 Documentation = "https://earningsfeed.com/api/docs"
 Repository = "https://github.com/earningsfeed/earningsfeed-python"
 Issues = "https://github.com/earningsfeed/earningsfeed-python/issues"
+PyPI = "https://pypi.org/project/earningsfeed/"
 
 [tool.hatch.build.targets.sdist]
 include = ["/src"]