Create python-package.yml.

[dajiaji]

Add github workflow for CI.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@976a15a). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #25   +/-   ##
=======================================
  Coverage        ?   88.47%           
=======================================
  Files           ?       13           
  Lines           ?      746           
  Branches        ?      172           
=======================================
  Hits            ?      660           
  Misses          ?       56           
  Partials        ?       30           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 976a15a...c9222ff. Read the comment docs.