Proposal: Update and refresh the documentation website (materialdesigninxaml.net)

まだ誰も着手していません。

**Is your feature request related to a problem? Please describe.**
Yes, the current documentation website, https://materialdesigninxaml.net/, appears to be significantly outdated. As a developer using the library, this creates several challenges:

* It doesn't showcase many of the new controls, features, and packages that have been added in recent versions.
* This can lead to confusion, as users might not be aware of the full capabilities of the toolkit and may spend time trying to create solutions that already exist.
* New users may have a difficult time getting started, as the information they find on the official site doesn't align with the latest NuGet packages and best practices.
* It can give the incorrect impression that the project is not actively maintained, which is far from the truth given the great work done in the repository.

**Describe the solution you'd like**
I propose a comprehensive update to the website to bring it in line with the current state of the library. This would ideally include:

* Updating the "Getting Started" guide to reflect the latest installation and setup procedures.
* Adding documentation and live demos for newer controls and features that are currently missing.
* Updating information about the available NuGet packages (like the color tool, transitions, etc.) and their specific functionalities.
* Ensuring all code snippets and examples are up-to-date with the latest API and best practices.

**Describe alternatives you've considered**
The main alternative is for users to rely solely on the GitHub repository, the Wiki, and release notes to understand new features. While this is possible for experienced users, it presents a high barrier to entry for newcomers and is less efficient than having a centralized, user-friendly documentation site that serves as the project's "front door".

**Additional context**
First of all, thank you for this fantastic library! It's an invaluable tool for WPF developers. An updated website would greatly improve the user experience, help with adoption, and better showcase the incredible progress the project has made. I believe this would be a significant enhancement for the entire community.

まず、materialdesigninxaml.net の現在のサイトを、リポジトリ、Wiki、リリースノート、現在の NuGet パッケージと併せて確認します。Getting Started ガイドを更新し、新しいコントロールと機能のカバレッジおよびライブデモを追加して、パッケージの詳細、コードスニペット、例を刷新します。サイトがライブラリの現在の機能とセットアップ手順を反映していれば完了です。

索引モデルが issue の本文から書いたものです。