We need to implement a buffering strategy for Grid Columns to support cases like OffscreenCanvas where removing the DOM node destroys the worker connection context.

Proposed Changes:

1. src/grid/column/Base.mjs:

   • Add hideMode config (String, default: 'removeDom').
   • Valid values: 'removeDom', 'visibility' (uses visibility: hidden), 'display' (uses display: none).
   • Note: visibility is preferred for Canvas to maintain layout geometry.

2. src/grid/Body.mjs:

   • Update rendering logic (createRow) to ensure columns with hideMode !== 'removeDom' are always rendered in the VDOM, regardless of whether they are within the mountedColumns window.
   • If such a column is outside the mounted range, it will be rendered with the appropriate hiding style.

Benefits:

• Solves the "Zombie Canvas" issue where horizontally scrolling destroys OffscreenCanvas connections.
• Improves scrolling performance for heavy column components by avoiding reconstruction.