refactor: updating typing for xreadgroup / xread / xadd

[imnotjames]

Pull Request check-list

• Do tests and lints pass with this change?
• Do the CI tests pass with this change (enable it first in your forked repo and wait for the github action build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
• Is there an example added to the examples folder (if applicable)?

Description of change

the typing for these functions are invariant and cannot be used with a typed dict as easily because of that

fixes #129

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.20%. Comparing base (e74cefa) to head (eb14418).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #130      +/-   ##
==========================================
- Coverage   76.20%   76.20%   -0.01%     
==========================================
  Files         130      130              
  Lines       33909    33911       +2     
==========================================
  Hits        25842    25842              
- Misses       8067     8069       +2     

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[imnotjames]

After running this a bit while developing interactions with valkey streams I think the types here seem to work and prevent incorrect types getting in.

I've been testing with pyright, tho - not mypy. Not sure how to validate with mypy.

[imnotjames]

Ah wait, perhaps I shouldn't have merged - that won't have the sign off 🤦

Let me know if you'd prefer a rebase.

EDIT: Yeah I'll just rebase so I get the build to run in my local repo

[mkmkme]

The changes look good to me. @Rafiot could you take a look and tell if the changes look good to you as well?

[Rafiot]

Yep, looks fine to me too.

[mkmkme]

Thanks!