[CI] Add codecov

[sotetsuk]

No description provided.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@604c433). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 319df3b differs from pull request most recent head eed2f56. Consider uploading reports for the commit eed2f56 to get more accurate results

@@           Coverage Diff           @@
##             main    #1000   +/-   ##
=======================================
  Coverage        ?   86.02%           
=======================================
  Files           ?       53           
  Lines           ?     5897           
  Branches        ?        0           
=======================================
  Hits            ?     5073           
  Misses          ?      824           
  Partials        ?        0