docs: enhance v4→v5 migration guide with comprehensive breaking change documentation

[Copilot]

• Analyze PR Releases/v5 #1967 commits and changes
• Review current MIGRATION_v4_to_v5.md file structure
• Create improved migration file with enhanced breaking change notes
• Add missing breaking change: require searchValue prop on select components
• Enhance existing breaking change descriptions with more context
• Add code examples where missing
• Review and commit changes
• Address feedback: Convert ContentCard migration guide to table format
• Address feedback: Remove redundant before/after examples
• Address feedback: Remove complex searchValue example

✅ Task Complete

Successfully enhanced the MIGRATION_v4_to_v5.md file with comprehensive breaking change documentation based on analysis of PR #1967.

Recent Updates:

• Removed redundant ContentCard before/after examples (table already shows intent-based mapping)
• Removed complex searchValue example with icons (basic example is sufficient)
• Streamlined documentation to focus on clear, concise migration guidance

Original prompt

I would like to modify MIGRATION_V4_TO_V5.md file in this branch.

Please follow the existing format in the document and improve on the breaking change notes by analyzing the commits and diff of #1967

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