ci: Publish python package to pypi

[aborgna-q]

Adds a CI job that

• Publishes each push to main to the test pypi repository.

• When a quantinuum-hugr-py-v* tag is pushed, publishes the python package to pypi
  (this is done generically, so other python

Closes #907

I will make another PR configuring release-please, to automate the changelog and releases side.
Until we are ready to publish 0.1.0, we can publish alpha versions manually by pushing tags.

[aborgna-q]

Perhaps we could do a --dry-run here, to avoid spamming the test registry

[cqc-alec]

We are only building with 3.10; should we be building with 3.11 and 3.12 as well?

[aborgna-q]

I added a python 3.12 target to the CI checks in addition to the 3.10.

The wheels we build are source-based, so they should be portable between versions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.63%. Comparing base (a2e4d05) to head (0d494db).

❗ Current head 0d494db differs from pull request most recent head 244c13a. Consider uploading reports for the commit 244c13a to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #908   +/-   ##
=======================================
  Coverage   85.63%   85.63%           
=======================================
  Files          78       78           
  Lines       14444    14444           
  Branches    14444    14444           
=======================================
  Hits        12369    12369           
  Misses       1436     1436           
  Partials      639      639           

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