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>

cpc_price.py

@@ -13,8 +13,10 @@ from datetime import datetime
 try:
     import requests
     from bs4 import BeautifulSoup
+    from rich.console import Console
+    from rich.table import Table
 except ImportError:
-    print("請先安裝依賴套件: pip install requests beautifulsoup4", file=sys.stderr)
+    print("請先安裝依賴套件: pip install requests beautifulsoup4 rich", file=sys.stderr)
     sys.exit(1)
 
 URL = "https://www.cpc.com.tw/historyprice.aspx?n=2890"
@@ -74,20 +76,17 @@ def print_table(records: list[dict], use_ad: bool) -> None:
         return
 
     headers = list(records[0].keys())
-    col_widths = [max(len(h), max(len(r[h]) for r in records)) + 2 for h in headers]
+    table = Table(show_header=True, header_style="bold")
+    for h in headers:
+        table.add_column(h)
 
-    def fmt_row(values):
-        return "  ".join(v.ljust(w) for v, w in zip(values, col_widths))
-
-    separator = "  ".join("-" * w for w in col_widths)
-
-    print(fmt_row(headers))
-    print(separator)
     for r in records:
         row = list(r.values())
         if use_ad:
             row[0] = roc_to_ad(row[0])
-        print(fmt_row(row))
+        table.add_row(*row)
+
+    Console().print(table)
 
 
 def print_csv(records: list[dict], use_ad: bool) -> None: