Add native Python GlobalPlatform runner and wire into run_globalplatform

[3rdIteration]

Motivation

• Replace the external gp.jar shell invocation with a native Python implementation to allow running GlobalPlatform operations without launching Java subprocesses.
• Provide a direct pyGlobalPlatform/libglobalplatform-backed path for install/delete/list/secure-channel key operations used by the applet tools.

Description

• Added src/seedsigner/helpers/globalplatform_native.py which implements GlobalPlatformNativeRunner and a _PyGlobalPlatformBackend that maps a subset of GlobalPlatformPro-style CLI commands (-l -v, --install, --create, --params, --delete, --unlock, --lock) to pyGlobalPlatform API calls and PC/SC actions.
• Updated run_globalplatform in src/seedsigner/helpers/seedkeeper_utils.py to call GlobalPlatformNativeRunner().run(command) and preserve the previous UI behaviour, PN532 restart handling, and user-facing error mapping.
• The native backend opens PC/SC context, selects a reader/card, performs SCP02 mutual authentication (default or provided keys), and executes load/installForInstallAndMakeSelectable/deleteApplication/putSCKey operations via the pyGlobalPlatform binding.
• Added focused unit tests tests/test_globalplatform_native.py to validate command parsing, dispatch, output formatting, and unsupported-command handling.

Testing

• Ran pytest -q tests/test_globalplatform_native.py and the tests passed.
• Ran pytest -q tests/test_flows_psbt.py -k satochip_connect_failure to ensure no regression in related flows and it passed.
• Ran a combined subset pytest -q tests/test_globalplatform_native.py tests/test_flows_psbt.py -k 'globalplatform_native or satochip_connect_failure' and the selected tests passed.

Notes: the native backend requires pyGlobalPlatform/libglobalplatform to be installed on the target system; when it is missing the code raises a clear error message instructing to install pyGlobalPlatform/libglobalplatform.

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