releng - update readme re twine publishing, publish full direct dep graph w/ marker

[kapilt]

closes #8 closes #9

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +2.56 :tada:

Comparison is base (5f450b1) 85.16% compared to head (c296ffe) 87.73%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #10 +/- ## ========================================== + Coverage 85.16% 87.73% +2.56% ========================================== Files 1 1 Lines 155 163 +8 ========================================== + Hits 132 143 +11 + Misses 23 20 -3 ``` | [Impacted Files](https://codecov.io/gh/cloud-custodian/poetry-plugin-freeze/pull/10?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cloud-custodian) | Coverage Δ | | |---|---|---| | [src/poetry\_plugin\_freeze/app.py](https://codecov.io/gh/cloud-custodian/poetry-plugin-freeze/pull/10?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cloud-custodian#diff-c3JjL3BvZXRyeV9wbHVnaW5fZnJlZXplL2FwcC5weQ==) | `87.73% <100.00%> (+2.56%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cloud-custodian). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cloud-custodian)

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