feat: initialize market app with browsing, product, and scraping code

Split from coop monolith. Includes:
- Market/browse/product blueprints
- Product sync API
- Suma scraping pipeline
- Templates for market, browse, and product views
- Dockerfile and CI workflow for independent deployment

scrape/product/helpers/price.py

@@ -0,0 +1,42 @@
+
+from __future__ import annotations
+import re
+from typing import Optional, Tuple
+
+def parse_price(text: str) -> Tuple[Optional[float], Optional[str], str]:
+    """
+    Return (value, currency, raw) from a price-like string.
+    Supports symbols £, €, $; strips thousands commas.
+    """
+    raw = (text or "").strip()
+    m = re.search(r'([£€$])?\s*([0-9][0-9.,]*)', raw)
+    if not m:
+        return None, None, raw
+    sym = m.group(1) or ""
+    num = m.group(2).replace(",", "")
+    try:
+        value = float(num)
+    except ValueError:
+        return None, None, raw
+    currency = {"£": "GBP", "€": "EUR", "$": "USD"}.get(sym, None)
+    return value, currency, raw
+
+def parse_case_size(text: str) -> Tuple[Optional[int], Optional[float], Optional[str], str]:
+    """
+    Parse strings like "6 x 500g", "12x1L", "24 × 330 ml"
+    Returns (count, item_qty, item_unit, raw)
+    """
+    raw = (text or "").strip()
+    if not raw:
+        return None, None, None, raw
+    t = re.sub(r"[×Xx]\s*", " x ", raw)
+    m = re.search(r"(\d+)\s*x\s*([0-9]*\.?[0-9]+)\s*([a-zA-Z]+)", t)
+    if not m:
+        return None, None, None, raw
+    count = int(m.group(1))
+    try:
+        item_qty = float(m.group(2))
+    except ValueError:
+        item_qty = None
+    unit = m.group(3)
+    return count, item_qty, unit, raw