Add AI policy update to Code of Conduct

[egrace479]

AI policy update (added to the Imageomics Code of Conduct) should be added to the Code of Conduct. This is applicable to both ABC and Imageomics and can thus be propagated to both Org-specific guides afterwards.

The specific addition is as follows:

AI use policy (borrowed from CRA):

• Allowable use of AI tools that do not share or use the data for training.
• Requires permission if recording others. Language to use when requesting permission:
  “We would like to use <insert tool name here> during this discussion to assist with note-taking. records and transcribes audio and can produce a summary of the discussion. The audio and transcription will only be saved and used internally. Please let us know if you object to the use of <insert tool name here>.”