feat: implement connect2gpx package and CLI

- Add fetcher using headless Chromium + CDP to bypass Cloudflare
- Add parser for Garmin geoPoints and GPX 1.1 writer
- Add CLI entry point and pyproject metadata
- Add uv.lock for reproducible dependencies

pyproject.toml

@@ -1,5 +1,17 @@
 [project]
 name = "connect2gpx"
 version = "0.1.0"
-requires-python = ">=3.15"
-dependencies = []
+requires-python = ">=3.13"
+dependencies = [
+    "websockets>=13.0",
+]
+
+[project.scripts]
+connect2gpx = "connect2gpx.cli:main"
+
+[build-system]
+requires = ["setuptools>=61"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools.packages.find]
+where = ["src"]