Use rich for table output; add uv project setup

- Replace manual column-width formatting with rich.Table
- Add pyproject.toml, uv.lock for dependency management
- Add .python-version (3.11) and .envrc for direnv/uv auto-setup
- Add main.py scaffold

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

pyproject.toml

@@ -0,0 +1,11 @@
+[project]
+name = "cpc-price-cli"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.11"
+dependencies = [
+    "beautifulsoup4>=4.14.3",
+    "requests>=2.32.5",
+    "rich>=14.3.3",
+]