Add databricks-powerbi-migration skill

[jjaiwant328]

Summary

• Adds a new databricks-powerbi-migration skill for migrating Power BI semantic models to Databricks metric views
• 16-step guided workflow covering: input scanning, PBI model parsing, catalog validation, schema extraction, mapping layer construction, ERD/domain generation, KPI definitions, data discovery, query optimization, existing metric view detection, metric view creation, report analysis, and deployment checklist generation
• Includes 6 Python/Bash utility scripts for automated parsing, comparison, and scaffolding
• Supports all PBI model formats (.pbit, .pbix, .bim, TMDL, JSON) via content-based detection
• Handles 4 migration scenarios (direct repoint, view layer, mapping document, intermediate mapping)

Files Added

• databricks-skills/databricks-powerbi-migration/SKILL.md -- main skill instructions (416 lines)
• databricks-skills/databricks-powerbi-migration/REFERENCE.md -- detailed patterns for 15 identified gaps
• databricks-skills/databricks-powerbi-migration/EXAMPLES.md -- input/output examples
• databricks-skills/databricks-powerbi-migration/approach.md -- high-level methodology
• databricks-skills/databricks-powerbi-migration/scripts/ -- 6 utility scripts

Files Modified

• databricks-skills/install_skills.sh -- registered new skill in DATABRICKS_SKILLS, get_skill_description, get_skill_extra_files
• databricks-skills/README.md -- added skill to Analytics & Dashboards section

Test plan

• Installed locally via install_skills.sh --local databricks-powerbi-migration
• Verified skill loads in Claude Code via /databricks-powerbi-migration
• Verified description-based routing triggers on Power BI migration prompts
• SKILL.md under 500 lines (416)
• All paths use forward slashes and are portable (no hardcoded absolute paths)
• No credentials or secrets in any file
• Passed Databricks pre-commit secret scanning hook