Create a way to pre-initialize the library

Description

A new class `QrInvoiceInitializer` class should be created, which can be used to pre-initialize the QR Invoice library. Pre-Initialization can be useful when
first call performance matters. One expensive task the initializer covers is TTF font file discovery, which is needed for PDF creation.

Assignee

Claude Gex

Reporter

Claude Gex

Labels

None

Fix versions

Priority

Medium
Configure