Improve docs about different usage methods

[ShahriarKh]

I wanted to create a pull request, but decided to create an issue instead because I'm not sure what's the best place for this.
I believe this should be noted somewhere in the README that @tabler/icon-webfont also exists for those who are not willing to use the CDN. Also, a usage example is necessary. For example, for React:

import '@tabler/icons-webfont/tabler-icons.min.css';

Not just the webfont, but I'm also confused about what @tabler/icons do and how someone should use it - with perhaps, vanilla js.

[BG-Software-BG]

@ShahriarKh let's see the documentation where different plugins/versions are described. For example https://tabler.io/docs/icons/webfont.

Some short snippets are also available at icon preview, e.g. https://tabler.io/icons/icon/a-b.

Is it something you were looking for?