`Documentation`: Add Athena overview #1011

Job	Run time
find_images_to_build	4s
build_image (assessment_module_manager)	1m 45s
build_image (log_viewer)	1m 25s
build_image (module_example)	1m 51s
build_image (module_programming_llm)	1m 52s
build_image (module_programming_themisml)	4m 7s
build_image (module_text_cofee)	1m 59s
build_image (module_text_llm)	2m 20s
build_image (playground)	3m 22s
	18m 45s

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