docs: update available plugins page

Author: johnnygreco

docs/plugins/available.md

@@ -1,17 +1,20 @@
 # Available Plugins
 
-## NVIDIA-maintained Plugins
+Data Designer plugins come from two places: NVIDIA-maintained first-party packages and community packages shared by Data Designer users.
 
-NVIDIA-maintained plugin packages live in the [DataDesignerPlugins](https://github.com/NVIDIA-NeMo/DataDesignerPlugins) repository. The catalog below is embedded from the generated [DataDesignerPlugins catalog](https://github.com/NVIDIA-NeMo/DataDesignerPlugins/blob/main/docs/catalog.md).
+## First-party plugins
 
---8<-- "https://raw.githubusercontent.com/NVIDIA-NeMo/DataDesignerPlugins/main/docs/catalog.md:5:"
+NVIDIA-maintained Data Designer plugins are developed and tested in the [DataDesignerPlugins](https://github.com/NVIDIA-NeMo/DataDesignerPlugins) repository.
 
-## Community Plugins
+- [Browse first-party plugin documentation](https://nvidia-nemo.github.io/DataDesignerPlugins/plugins/) for available plugins and usage instructions.
+- [View plugin packages](https://github.com/NVIDIA-NeMo/DataDesignerPlugins/tree/main/plugins) for source code, package metadata, and tests.
 
-We do not have community plugins listed yet, but yours could be the first! If you build a reusable plugin that others may find useful, please consider publishing it and asking us to add it here.
+## Community plugins
 
-To request a listing, please:
+There are no community plugins listed yet, but yours could be the first! If you build a plugin, please consider publishing and requesting a listing so other Data Designer users can find it here.
 
-1. Build the plugin using the patterns in [Build Your Own](build_your_own.md) and the NVIDIA-maintained [DataDesignerPlugins](https://github.com/NVIDIA-NeMo/DataDesignerPlugins) repository.
+To build and share a community plugin:
+
+1. Build the plugin following the [Build Your Own](build_your_own.md) guide. 
 2. Publish the plugin package to [PyPI](https://pypi.org/).
-3. Open a GitHub issue on the [Data Designer repository](https://github.com/NVIDIA-NeMo/DataDesigner/issues) requesting a catalog listing. Include the package name, PyPI URL, source repository, documentation link, supported Data Designer version, and plugin type.
+3. Open a GitHub issue on the [Data Designer repository](https://github.com/NVIDIA-NeMo/DataDesigner/issues) with the package name, PyPI URL, source repository, documentation link, supported Data Designer version, and plugin type.