fix(ui): add numbered pagination and row numbers to ION file preview.

[BrajamohanDas-afk]

✨ Description

Adds numbered pagination and row numbers to the ION file preview table.

• Replaces custom pagination with Element Plus numbered pagination component
• Adds a row number column showing actual file position
• Increases backend fetch limits to 500 default / 5000 max
• Adds pagination summary display ("Showing rows X-Y of Z")
• Prevents UI freeze for large ION files

🔗 Related Issue

Closes #11886

🎨 Frontend Checklist

• Code builds without errors (npm run build)
• All existing E2E tests pass (npm run test:e2e)
• Screenshots or video recordings attached showing the UI changes

📝 Additional Notes

• Please see attached screen record for before/after comparison.
• No backend code was changed.

Comparision.mp4

[Piyush-r-bhaskar]

@BrajamohanDas-afk could you share you flow used for testing this ?

nvm, I got this here #11886 (comment)

[Piyush-r-bhaskar]

Hey @BrajamohanDas-afk

Thanks for your PR.

Could you make use of a common Pagination component ui/src/components/layout/Pagination.vue in our repo to avoid multipe lines of code ?

[BrajamohanDas-afk]

Yes, I will do that.