Modal Fix In Template Project

[chrisoChen]

Added fix so modal opens after clicking on the button in the tailwind template starter project

Fix involves the following:

1. Use libman instead of npm to install flowbite to the starter project
2. Add a missing attribute, data-modal-target to get the modal to open
3. Use IJSRuntime to invoke the flowbite function initModals to initialize the modal

Note: Must manually use libman to install flowbite to the wwwroot folder to work. Library files for flowbite have been excluded in this commit.