Aeadocscleanup

[FelixNicolaeBucsa]

@5A11 @GataKamsky @VijaySharma815 I changed the Index section with a new Introduction section. According to the doc i have created gathering the AEA Framework docs the introduction section is as follows:

Introduction Agent-oriented development Who is the AEA Framework for? What benefits could you have by adopting the AEA Framework?

I have reviewed the agent-oriented development section and added it to this PR as well.

[codecov-commenter]

Codecov Report

Merging #2737 (fab9def) into main (18c0c49) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2737   +/-   ##
=======================================
  Coverage   98.27%   98.27%           
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  Files         522      522           
  Lines       36450    36450           
=======================================
  Hits        35821    35821           
  Misses        629      629           

Flag	Coverage Δ
unittests	98.27% <ø> (ø)

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