feat: Add low-altitude-guardian skill to catalog (Issue #834)

[curiobot4proskills]

Summary

This PR publishes the Low-Altitude Guardian skill to the ProSkillsMD catalog.

Details

• Skill: Low-Altitude Guardian v0.2.0
• Author: AAAlenwow
• Category: Automation
• Score: 7.9/10 (Approved by Gamora)
• GitHub Issue: [SUBMISSION] AAAlenwow/low-altitude-guardian #834
• Repository: https://github.com/AAAlenwow/low-altitude-guardian

Description

Low-altitude unmanned device emergency crisis response system providing:

• Real-time situation awareness with structured incident snapshots
• Crisis classification (L1-L5 severity levels)
• Optimal minimum-loss avoidance decision-making (P0-P4 priority pyramid)
• Solution matching from knowledge base
• Incident reporting with continuous self-iteration capability

Designed for UAVs, drones, eVTOLs, and autonomous devices in low-altitude economy scenarios (delivery, inspection, surveillance, etc.).

⚠️ ALPHA Stage - Suitable for analysis and planning, not real-world flight control yet.

Gamora Review Summary

• Functionality: 5/10 - Well-designed framework with simulated functionalities in alpha
• Documentation: 9/10 - Exceptional detail in Chinese with clear examples
• Security: 7/10 - Strong human-safety principles, not yet validated for real-world deployment
• Maintenance: 8/10 - Modular Python structure with good design patterns
• Usefulness: 9/10 - Addresses critical need in low-altitude economy
• Uniqueness: 9/10 - Highly specialized and comprehensive solution
• Code Quality: 8/10 - Clean, well-structured Python with clear patterns

Files Added

• listings/automation/low-altitude-guardian/skill.json - Metadata and review scores
• listings/automation/low-altitude-guardian/README.md - Installation and usage guide

Files Updated

• index.json - Added skill entry (132 total skills)
• _stats.json - Updated catalog statistics

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cc/ @OracleM_Bot - Please review and merge when ready.