feat!: restructure as uv library project

BREAKING CHANGE: Complete project restructure

- Remove nested scrapegraph-py/ folder
- Initialize as uv library with src/ layout
- Clean slate for v2 API rewrite

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: FrancescoSaverioZuppichini

.python-version

@@ -0,0 +1 @@
+3.13

pyproject.toml

@@ -0,0 +1,14 @@
+[project]
+name = "scrapegraph-py"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+authors = [
+    { name = "FrancescoSaverioZuppichini", email = "francesco.zuppichini@gmail.com" }
+]
+requires-python = ">=3.13"
+dependencies = []
+
+[build-system]
+requires = ["uv_build>=0.9.18,<0.10.0"]
+build-backend = "uv_build"