Replace webview-ui-toolkit with a more flexible GUI library

[jreineckearm]

Description

The Memory Inspector WebView implementation is currently based on the Webview UI Toolkit for Visual Studio Code.
This provided a good start. But we do have some feature requests which may bring the toolkit and its components to their limit.
One example is #10 which I believe is affected by https://github.com/microsoft/vscode-webview-ui-toolkit/blob/main/src/data-grid/README.md#editable-data-grid and would require extra GUI development effort on top of it. We may hit more limitations soon with requests in #48 .

I'd like to propose an investigation of using a different GUI library to replace the currently used Webview UI Toolkit for Visual Studio Code.

Additional information