3 set up mkdocs documentation like in instructor aiinstructor js

[sergiobayona]

The following docs were updated to reflect Instructor-rb:

• docs
  • blog
    • .authors.yml
    • index.md
  • concepts
    • patching.md
    • philosophy.md
    • schema.md
  • examples
    • action_items.md
    • action_itesm.png
    • index.md
  • overrides
    • main.html
  • contributing.md
  • help.md
  • index.md
  • installation.md

[sergiobayona]

@jxnl okay I left the following placeholder files in the docs/examples folder:

• classification.md
• content_moderation.md
• query_decomposition.md
• self-correction.md
• validated_citations.md