ArchiveHandle for the created archive.
Example:
auto co = CreateOptions.create();
auto fo = FilterOptions.create();
fo.addInclude("*.txt"); // Only include .txt files
fo.addExclude("*.bak"); // Exclude backup files
OperationStats stats;
auto arc = createArchiveFiltered("/home/user/docs", "/backups", "docs", "dar", co, fo, stats);
writefln("Files archived: %d", stats.treated);