Make AISH configurable with the config.json file located under the configuration home folder of AISH
Currently, it only supports DefaultAgent field in the configuration.
Make openai-gpt and interpreter agents create example setting file when the setting file is missing, so the first-time user can use them as the template files to create their own settings.
PR Summary
Fix #146 Fix #161
config.jsonfile located under the configuration home folder of AISHDefaultAgentfield in the configuration.openai-gptandinterpreteragents create example setting file when the setting file is missing, so the first-time user can use them as the template files to create their own settings.