Feat/add chain name to orderbook

[rozanagy]

This pull request includes several changes to the ProofOfReserve and MerchantTable components to improve layout and functionality.

Introduced MerchantTable component utilizing GenericTableLayout for improved layout and code reuse.
Removed MerchantTableHeader component as its functionality is now covered by GenericTableHeader.

Adjusted widths and text properties for better alignment and display in MerchantTableItem.
Updated ProofOfReserve component to use the new MerchantTable component.

Added Chain column and adjusted widths for better display. Adjusted layout widths and added Chain column header.

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[Polybius93]

Super, looks good, nice job!