[@mantine/dates] Apply numberOfRows consistently to year and decade levels

[QuaduxIT]

Summary

When using Calendar with
umberOfColumns +
umberOfRows, month level supports the expected multi-row layout, but year/decade levels are not fully aligned with the same behavior.

Proposal

Apply
umberOfRows consistently across all Calendar levels:

• month
• year
• decade

This keeps visible panel count and navigation edge logic consistent across levels.

Notes

I already prepared an implementation and can open a PR.