✨ Add flexible currency parser with validation and symbol detection for Pydantic models

[mohamedmamdouh22]

• Implemented CurrencyParser to parse and validate currency inputs, detecting symbols and converting them to standardized currency codes.
• Added ParserTypeCurrency using Annotated and BeforeValidator for seamless integration with Pydantic models, returning structured dictionaries.
• Supports numeric and string inputs, gracefully handling None values and unavailable price indicators.
• Ensures consistent dictionary output for reliable testing and usage.

[awtkns]

why are we doing approx? Whats the limit here

[mohamedmamdouh22]

i usually do this when comparing floats to avoid any unexpected percision issues

[awtkns]

Please add a full schema parsing test by adding a mock schema in core/test/parser/mock_schemas that uses both currency and price. We need to validate the case when currency is all null