Get PyPI install from source working

[raphaelshirley]

By including a manifest file we can hopefully ensure that the pybind source is recursively cloned and shipped which will allow pypi to build from source when binaries are not available

Closes #217 #220

It is still unclear to me whether compiler and the required libraries will also be installed as required.

• My PR includes a link to the issue that I am addressing

Solution Description

Code Quality

• I have read the Contribution Guide
• My code follows the code style of this project
• My code builds (or compiles) cleanly without any errors or warnings
• My code contains relevant comments and necessary documentation

Project-Specific Pull Request Checklists

Bug Fix Checklist

• My fix includes a new test that breaks as a result of the bug (if possible)
• My change includes a breaking change
  • My change includes backwards compatibility and deprecation warnings (if possible)

New Feature Checklist

• I have added or updated the docstrings associated with my feature using the NumPy docstring format
• I have updated the tutorial to highlight my new feature (if appropriate)
• I have added unit/End-to-End (E2E) test cases to cover my new feature
• My change includes a breaking change
  • My change includes backwards compatibility and deprecation warnings (if possible)

Documentation Change Checklist

• Any updated docstrings use the NumPy docstring format

Build/CI Change Checklist

• If required or optional dependencies have changed (including version numbers), I have updated the README to reflect this
• If this is a new CI setup, I have added the associated badge to the README

Other Change Checklist

• Any new or updated docstrings use the NumPy docstring format.
• I have updated the tutorial to highlight my new feature (if appropriate)
• I have added unit/End-to-End (E2E) test cases to cover any changes
• My change includes a breaking change
  • My change includes backwards compatibility and deprecation warnings (if possible)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.61%. Comparing base (8adf41f) to head (b57ed26).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #221      +/-   ##
==========================================
+ Coverage   66.40%   66.61%   +0.20%     
==========================================
  Files          50       50              
  Lines        6225     6221       -4     
  Branches      941      937       -4     
==========================================
+ Hits         4134     4144      +10     
+ Misses       2091     2077      -14     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[johannct]

lgtm