Add -v/--verbose flag to control trace output

[Jino26]

Introduce EMU_LOG, EMU_ERR & EMU_INFO logging macros gated by a new m_verbose flag. By default only errors and essential messages are shown; passing -v or --verbose restores full platform traces and hex dumps. All printf() calls in spdm_requester_emu & spdm_responder_emu are converted to the appropriate macro.

Feature #478

[Jino26]

Test results:

Without verbose option (only errors & essential traces printed):

$ ./spdm_responder_emu
ERROR: receive_platform_data Error - 2
ERROR: Server Critical Error - STOP
SPDM Responder server stopped

With verbose option:

$ ./spdm_responder_emu -v
spdm_responder_emu version 0.1
context_size - 0x2f10
Platform server listening on port 2323
Platform port Receive command: 00 00 de ad
Platform port Receive transport_type: 00 00 00 01
Platform port Receive size: 00 00 00 0e

Combined with other options:

./spdm_responder_emu -v --trans TCP
trans - 0x3
spdm_responder_emu version 0.1
context_size - 0x2f10
Platform server listening on port 4194
Platform port Receive command: 00 00 de ad
Platform port Receive transport_type: 00 00 00 03
Platform port Receive size: 00 00 00 0e