ConfigurePdfLibrary procedure

Sets the process-wide native initialisation settings used by the next LoadLibrary call

ConfigurePdfLibrary stores the native initialisation settings that LoadLibrary passes to FPDF_InitLibraryWithConfig when the PDFium module is first loaded

The record covers UserFontPaths, V8Isolate, V8EmbedderSlot, V8Platform, Renderer (prpAgg or prpSkia), FontBackend (pfbpFreeType or pfbpFontations), BrotliEnabled, and AllowMachineTime

The configuration is deep-copied, including the UserFontPaths array, so later changes to the caller's record have no effect

AllowMachineTime controls the FPDF_SetSandBoxPolicy machine-time policy applied right after native initialisation, and TPdfLibraryConfiguration.Hardened is the shortcut that disables it

• Must be called before the first LoadLibrary; once the configuration is sealed a second call raises EPdfError
• An explicit FontBackend other than pfbpDefault requires Renderer prpSkia, otherwise EPdfError is raised
• An empty entry in UserFontPaths raises EPdfError
• Call it before any TPdf operation, because most entry points trigger the implicit library load

GetPdfLibraryConfiguration, PdfLibraryConfigurationSealed, TPdf.LoadLibrary, ConfigureSystemFontProvider