docs: Polaris Icons v9 vs v13 变化对比表

[devin-ai-integration]

Summary

Adds a Markdown document (POLARIS_ICONS_DIFF.md) comparing icons between @shopify/polaris v9 (polaris-icons@4.22.0) and v13 (polaris-icons@9.3.1). The data was generated programmatically by:

• Extracting icon SVG filenames from the corresponding git tags in the Polaris monorepo
• Using the official icons-v8-update-names migration rename map to correlate old Major/Minor names → new Icon names
• Computing renamed, new, and deleted icon sets

Key findings:

Metric	Value
v9 icon count	410
v13 icon count	534
Renamed (deduplicated)	335
New in v13	199
Deleted	0

The document includes: version-by-version change summary, full rename table, full new-icons list, and data sources.

Review & Testing Checklist for Human

• Spot-check "new" icons list for false positives. Some icons listed as "new" (e.g. DataTableIcon, ChartCohortIcon, ChartLineIcon) correspond to rename-map entries whose v9 source names (AnalyticsTableMajor, AnalyticsCohortMajor, AnalyticsLineMajor) did not have SVG files in the v9 polaris-icons/icons/ directory. These are arguably renames rather than truly new icons — verify whether this distinction matters for your use case.
• Spot-check a few rename mappings against the official migration map to confirm accuracy (e.g. AccessibilityMajor → EyeCheckMarkIcon, CancelMajor → XIcon).
• Verify the v9 baseline tag (@shopify/polaris@9.9.0) matches the Polaris v9 version your project actually uses — if you're on a different minor (e.g. 9.24.0), the icon set may differ slightly.

Notes

• The v9 icon list is based on SVG files present in polaris-icons/icons/ at that tag. Not every icon name in the rename map had a corresponding SVG (some Major/Minor variants shared the same file), so the rename table only includes matches found in the actual file listing.
• The "数据来源" section links to polaris-react (the original repo URL) but this now redirects to the Shopify/polaris monorepo.

Link to Devin session: https://app.devin.ai/sessions/62934ddd4563496a8636f76de6d83e83
Requested by: @leijuns

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring