Delete lagged oil unemployment rate chart script and add new files

Removed the `lagged_oil_unrate_chart_styled.py` script as it is no longer needed. Added a `.gitignore` file, a `requirements.txt` for dependencies, and a `scripts/` directory for future development.

scripts/pyproject.toml

@@ -0,0 +1,14 @@
+# pyproject.toml
+
+[project]
+name = "lagged-oil-unrate"
+version = "0.1.0"
+description = "Plot UNRATE vs WTI oil price with adjustable lag"
+authors = ["Your Name <[email protected]>"]
+dependencies = [
+  "pandas>=1.3.0",
+  "pandas_datareader>=0.10.0",
+  "matplotlib>=3.4.0",
+  "python-dateutil>=2.8.0",
+  "lxml>=4.6.0"
+]