fix: improve drag-and-drop scroll sensitivity in columns

[ManukMinasyan]

Summary

• Enhances SortableJS scroll configuration for column containers during drag-and-drop
• Sets scrollSensitivity: 100 (from default 30), scrollSpeed: 15, and forceAutoScrollFallback: true
• Makes dragging cards to off-screen positions (top/bottom of scrollable columns) significantly easier

Root Cause

Filament's x-sortable directive creates SortableJS instances without configuring forceAutoScrollFallback, which is needed for proper auto-scroll in nested overflow containers. The default scrollSensitivity of 30px was also too conservative for column-based kanban layouts.

Test plan

• All 112 existing tests pass
• Manual test: drag card to top of a scrolling column (off-screen) -- auto-scroll should trigger within ~100px of edge
• Manual test: drag card to bottom of a scrolling column (off-screen) -- same behavior
• Manual test: drag between columns still works as before

Closes #102

[Copilot]

Pull request overview

This PR improves the drag-and-drop auto-scroll behavior for kanban columns by updating the underlying SortableJS scroll settings on Filament’s x-sortable containers, making it easier to drag cards to off-screen positions within scrollable columns.

Changes:

• Add an Alpine helper (enhanceSortableScroll) to update SortableJS options for all [x-sortable] elements in the Flowforge component.
• Invoke the helper on component initialization via $nextTick.
• Rebuild the bundled Alpine component output.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
resources/js/flowforge.js	Adds enhanceSortableScroll() and calls it on init to increase scroll sensitivity/speed and enable forceAutoScrollFallback.
resources/dist/flowforge.js	Updates the compiled/minified distribution build to include the new behavior.

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