fix(ui): move pagination data into script tag

[crivetimihai]

Note: This PR was re-created from #3006 due to repository maintenance. Your code and branch are intact. @gcgoncalves please verify everything looks good.

🐛 Bug-fix PR

📌 Summary

1. Define paginationData() once as a global function in admin.js, with all its methods.
2. Replace the inline Jinja2 data in the template with data-* attributes;

Closes #2975
Closes #3040

🔁 Reproduction Steps

1. Access the Admin UI
2. Open the browser console
3. Check there are no errors
4. Navigate to the table tabs (mcp gateways, virtual servers, tools...)
5. Check pagination is working correctly (change items per page, switch pages, etc.)

🐞 Root Cause

Jinja was escaping JS content inside a x-data attribute.

💡 Fix Description

Moved the JS object inside a script tag to prevent escaping, then referred to it from the x-data attribute.

🧪 Verification

Check	Command	Status
Lint suite	make lint	✅
Unit tests	make test	✅
Coverage ≥ 80 %	make coverage	✅
Manual regression no longer fails	steps / screenshots	✅

✅ Checklist

• Code formatted (make black isort pre-commit)
• No secrets/credentials committed

[marekdano]

Approving, as it was already approved by myself on #3006

LGTM 🚀

[marekdano]

@gcgoncalves - can you please resolve conflicts?

[gcgoncalves]

Changing from 1.1.0 to 1.0.0, to make the plugins intractable.

[marekdano]

@gcgoncalves - I can approve this PR after eslint and pytest are fixed.

[gcgoncalves]

@marekdano

[marekdano]

LGTM 🚀