Initial implementation of generic Excel-to-DB import tool

Supports .xls and .xlsx, Oracle and PostgreSQL via SQLAlchemy.
Includes CLI (run/inspect/generate-config), YAML config, auto schema
detection, and append/replace/upsert modes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,24 @@
+[build-system]
+requires = ["setuptools>=68", "wheel"]
+build-backend = "setuptools.backends.legacy:build"
+
+[project]
+name = "excel-import"
+version = "0.1.0"
+requires-python = ">=3.10"
+dependencies = [
+    "pandas>=2.0",
+    "openpyxl>=3.1",
+    "xlrd>=2.0",
+    "sqlalchemy>=2.0",
+    "psycopg2-binary>=2.9",
+    "oracledb>=2.0",
+    "pyyaml>=6.0",
+    "click>=8.1",
+]
+
+[project.scripts]
+excel-import = "excel_import.cli:main"
+
+[project.optional-dependencies]
+dev = ["pytest>=8.0", "pytest-mock>=3.0"]