Add Filament Tree View plugin

content/authors/openplain.md

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+---
+name: Openplain
+slug: openplain
+github: https://github.com/openplain
+---
+
+A calm space for open-source building blocks.
+We build small, well-structured libraries and tools — the kind that help other projects stay simple, clear, and dependable.
+Every repository here follows the same ideas: openness, clarity, and minimalism.

content/plugins/openplain-filament-tree-view.md

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+---
+name: Filament Tree View
+slug: openplain-filament-tree-view
+author_slug: openplain
+categories: [data-management]
+description: "Tree view for Filament resources - drop-in replacement for Table with drag-and-drop hierarchical data management"
+github_repository: openplain/filament-tree-view
+versions: [4]
+publish_date: 2025-01-15
+has_dark_theme: true
+has_translations: false
+---
+
+A powerful drag-and-drop tree view for Filament resources. Display and manage hierarchical data with the same elegant developer experience you expect from Filament.
+
+**Key Features:**
+
+- 🌳 Intuitive drag-and-drop reordering with visual feedback
+- 📦 Drop-in replacement with familiar API if you've used Filament Tables
+- 🎯 Depth control to limit tree nesting
+- 💾 Manual or auto-save modes
+- 🎨 Custom fields (TextField and IconField) to display any data
+- 🔧 Full support for Filament actions (edit, delete, custom)
+- 🌗 Seamless dark mode integration
+- ♿ Built-in keyboard navigation and screen reader support
+- 🔒 Safe operations preventing circular references
+
+**Built on Proven Technology:**
+
+- Laravel Adjacency List - Battle-tested package for recursive relationships
+- Pragmatic Drag & Drop - Atlassian's accessible, performant library used in Jira, Trello, and Confluence
+- Filament's Core Components - Built with the same patterns and architecture as native Filament resources
+
+Perfect for building navigation menus, product categories, department hierarchies, and any other tree-structured data in your Filament applications.