docs: new section "Migrating from other Loggers"

[heitorlessa]

Issue #, if available: #143

Description of changes:

This creates a new section to address common concerns customers migrating from Python Logging or other libraries to Powertools Logger:

• Add clarifications on Service parameter
• Add clarifications on Inheriting Loggers
• Add clarifications on Overriding Log records
• Add clarifications on Logging exceptions

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

Breaking change checklist

RFC issue #:

• Migration process documented
• Implement warnings (if it can live side by side)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

Merging #148 into develop will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           develop      #148   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           24        24           
  Lines          705       705           
  Branches        68        68           
=========================================
  Hits           705       705           

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[michaelbrewer]

@heitorlessa looks good !