Unify configuration and document it

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.10390% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 95.66%. Comparing base (8747502) to head (7b095ec).

Files	Patch %	Lines
sam/contrib/github/tools.py	78.57%	3 Missing :warning:
sam/utils.py	93.33%	2 Missing :warning:
sam/contrib/github/__init__.py	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #69 +/- ## ========================================== - Coverage 95.66% 95.66% -0.01% ========================================== Files 11 17 +6 Lines 508 553 +45 ========================================== + Hits 486 529 +43 - Misses 22 24 +2 ```

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[sentry-io[bot]]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ OSError: Run run_aTcjuViHdB5M8pEgytKSKYtd failed with status incomplete sam.bot in complete_run View Issue
• ‼️ OSError: Run run_VWKNZHuKsHvdZhAbWyHcdlBj failed with status failed sam.bot in complete_run View Issue
• ‼️ OSError: Run run_yHCNypV1p6hxw4Fg1ehk5mbP failed with status incomplete sam.bot in complete_run View Issue
• ‼️ OSError: Invalid arguments for tool fetch_website, cancelling run run_7knmVGWP0Nwd9TaVGaZAmvKH sam.bot in call_tools View Issue

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