Function decodeMACCapabilities

05-3474-23 R23.1, Table 2-36 (MAC capability information field)

SPEC COMPLIANCE NOTES:

• ✅ Maps capability bits used during association joins (device type, power, security)
• ✅ Preserves reserved bits as zero to comply with Zigbee profile requirements
• ⚠️ Leaves semantic validation (e.g., alt coordinator) to stack-context policy DEVICE SCOPE: All logical devices.