refactor(appkit): relocate shared agent utilities into plugins/agents#296

MarioCadenas wants to merge 1 commit intoagent/5c-migrate-agent-app-docsdatabricks/appkit:agent/5c-migrate-agent-app-docsfrom

agent/5d-relocate-shared-agent-filesdatabricks/appkit:agent/5d-relocate-shared-agent-filesCopy head branch name to clipboard