fix: add the links of pypi and testpypi, add the output of intercept and coefficients

[andyzhangstat]

fix: add the links of pypi and testpypi, add the output of intercept and coefficients

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (3aa877b) 100.00% compared to head (9e92b78) 100.00%. Report is 1 commits behind head on readme.

:exclamation: Current head 9e92b78 differs from pull request most recent head 0757e29. Consider uploading reports for the commit 0757e29 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## readme #70 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 4 4 Lines 70 70 ========================================= Hits 70 70 ```

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[andyzhangstat]

address the issue in #69 and #67 and #64

[fohy24]

looks good!