docs: readability improvements

[heitorlessa]

Issue #, if available:

Description of changes:

• Improved navigation menu in Tracer, Logger, and Metrics to match what customers are looking for
• Changed utilities list to table as we're growing
• Added quick hello world SAM CLI example
• Minor readability and rewording in Tracer, Logger, and Metrics
• Added official blog post to the main page

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

@@            Coverage Diff            @@
##           develop      #130   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           24        24           
  Lines          701       701           
  Branches        66        66           
=========================================
  Hits           701       701           

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