parse_market_value macro does not handle billion (bn) notation

[dcaribou]

Description

The parse_market_value macro in dbt/macros/parsing.sql uses the regex (£|€)([0-9\.]+)(Th|k|m|M) which does not match values in the billions format (e.g. €1.32bn).

Impact

At least 3 national teams return NULL for total_market_value due to this:

• England: €1.32bn
• France: €1.45bn
• Spain: €1.16bn

This likely also affects top clubs whose market values exceed €1bn.

Fix

Extend the regex to include bn and add a corresponding factor of 1e9 in the CASE statement.