The current actively-developed VSCode extension is Tinymist. Its workflow is great and addresses all your issues (to the extent they are even relevant to Typst):

> Well, the feature you mentioned of clicking the PDF and redirecting to the source.

Tinymist does this. Click on text and it redirects the document buffer to the corresponding source text.

> Preview in the same buffer (window) as the code

Tinymist previews in a separate tab for side-by-side real-time writing with a preview.

> It uses other regexps to recognize the enabled packages, and then adds the package's macros and environments to its list, so with a command you can open an environment or macro, and it recognizes which packages you are using, if you are in a math environment, etc. and shows only the ones you can use in the context. It's like a super-intelligent set of macros.

This sounds like an artifact of Tex. The standard Typst library is very thorough. And for everything else, Typst has automatic retrieval of community packages. Just add an #import and it just works:

    #import "@preview/example:0.1.0": add
    #add(2, 7)

> AucTex has also great support for bibtex/biblatex, and glossary/glossaries, both for using the macros and for compiling.

This just works with Typst in-the-box for bibliographies, and with the glossarium package for glossaries (just add with: #import "@preview/glossarium:0.4.2": *). But one thing a Typst IDE like Tinymist or the web service adds to the writing environment is an autocomplete for labels and citations. Just start typing the reference and get autocomplete options.

> Automatic, intelligent, labeling.

Not sure what this means, but you can add a label to headings, figures, etc. and quickly reference them with @label, and the current IDEs