Add functionSignatures.json

[ccreutzi]

Cf. MATLAB documentation for details about the file format.

JSON unfortunately does not allow comments. Some of the "type" definitions in the file do not match accepted values exactly: I have not listed that several name value pairs accept empties, and have not found a good way to say that StopSequences can have at most four entries. Nothing in here removes the existing input validations.

[ccreutzi]

Here's the reported test failure:

  ================================================================================
  Error occurred in texampleTests/testRetrievalAugmentedGenerationUsingChatGPTandMATLAB and it did not run to completion.
      ---------
      Error ID:
      ---------
      'MATLAB:webservices:Timeout'
      --------------
      Error Details:
      --------------
      Error using websave (line 98)
      The connection to URL
      'https://openknowledge.worldbank.org/bitstreams/0c18c872-91f0-51a4-ba91-c36b98893b4a/download'
      timed out after 5.000 seconds. The reason is "Waiting for response header".
      Perhaps the server is not responding or weboptions.Timeout needs to be set
      to a
      higher value.
      
      Error in RetrievalAugmentedGenerationUsingChatGPTandMATLAB (line 14)
          websave(local_file_name, url{i});
      
      Error in texampleTests/testRetrievalAugmentedGenerationUsingChatGPTandMATLAB
      (line 54)
                  RetrievalAugmentedGenerationUsingChatGPTandMATLAB;
  ================================================================================

I don't like that we have tests relying on external servers. And I am going to ignore this test failure here – changing functionSignatures.json should not be able to cause a remote server running into a timeout.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.72%. Comparing base (1365049) to head (3d8794d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #38   +/-   ##
=======================================
  Coverage   56.72%   56.72%           
=======================================
  Files          33       33           
  Lines        2015     2015           
=======================================
  Hits         1143     1143           
  Misses        872      872           

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