[NX-2838] Agent metrics to read Windows Registry entries

[netxms-migration-bot]

Guess that two things are needed

• metric to read specific registry key
• list to get list of keys at specific registry path

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Migrated from track.radensolutions.com

• Original Issue: NX-2838
• Type: Feature
• State: Fixed
• Priority: Normal
• Subsystem: Core Agent and Subagents
• Created: 2025-09-25 18:06:11 UTC
• Updated: 2025-11-05 13:22:13 UTC
• Reporter: filipp.sudanov (@filippsudanov)
• Last Updated By: Victor Kirhenshtein (@2128506)