v0.19.0

• Add no_std support behind a new std feature (enabled by default), allowing the crate to be used on embedded
  platforms with alloc (#49) (Thanks to @pierre42100)
• Add Printer::driver to release ownership of the underlying driver (useful in no_std environments)
• CI now builds the crate with --no-default-features to prevent silent no_std regressions
• spin and hashbrown are pulled in with default-features = false and minimal features to keep the dependency
  footprint small
• When the std feature is enabled, std::sync::LazyLock and std::collections::HashMap are used instead of
  spin::Lazy and hashbrown::HashMap
• Barcodes and 2D codes are now exposed in no_std mode (previously gated on std)
• Update Tauri example: bump tauri to 2.11, tauri-build to 2.6, tauri-plugin-opener to 2.5,
  @tauri-apps/cli to 2.11, switch to Rust edition 2024, and align UsbDriver::open call with the new
  UsbOption argument

See CHANGELOG.md for more details