docs(v0.14): wrap asset callback table cells

[Jr-kenny]

Summary

• add wrap opportunities to the long callback storage-slot identifiers on the v0.14 asset page
• shorten the callback descriptions slightly so the table fits more cleanly beside the right-hand sidebar

Why

The asset callbacks table currently overflows horizontally because the storage-slot names are too wide for the content column. Giving those identifiers explicit wrap points keeps the content readable without changing the meaning.

Testing

• git diff --check
• did not run a full Docusaurus build locally; change is limited to one versioned markdown table row layout

Closes #261