Improve currency symbol detection

[RubenIgnacio]

The version v1.13.0 of monetize currently detects limited currency symbols. For example:

Expected behavior:

Monetize.parse('S/10') # <Money fractional:1000 currency:PEN>
Monetize.parse('PEN10') # <Money fractional:1000 currency:PEN>

Current behavior:

Monetize.parse('S/10') # <Money fractional:1000 currency:USD>
Monetize.parse('PEN10') # <Money fractional:1000 currency:USD>

Proposed Solution

The Money::Currency.table can be used to retrieve the list of currency symbols. In cases where symbols are repeated, the disambiguate_symbol can be used as the symbol. However, this solution has some limitations:

• Symbols that contain dots may be confused with decimal marks.
• Certain symbols can be misinterpreted as multiplier suffixes (e.g., "K" for thousands).

To address these limitations, such symbols will be ignored during parsing. Additionally, any problematic symbols can be added to a list of ignored symbols to prevent issues. This can be a starting point but can be refined further to handle more cases and support additional symbols in the future.