Persistent interactive mode

Improved piped input support

feat: improve error handling and document v0.7.1 changes

release: v0.7.0

release: v0.6.1 with progress bar, timeout, and CSV output

chore: release v0.6.0 with --output support and doc updates

Add --threads flag and parallel stdin factorization (v0.5.0)

fix: set default precision to 30 for --stdin mode

feat(cli): support multiple inputs via --stdin for batch factorization

Added test suite for factoring large semiprimes using the `difference…

…_of_squares` method.