chore(theme-seti): add icon for eslint flat config

[kecrily]

Adding icon support for new eslint config file(eslint.config.js) to seti theme

[aeschli]

Thanks for contributing, but this needs to go to the ttps://github.com/jesseweed/seti-ui repo.

See the header of the file:

	"information_for_contributors": [
		"This file has been generated from data in https://github.com/jesseweed/seti-ui",
		"- icon definitions: https://github.com/jesseweed/seti-ui/blob/master/styles/_fonts/seti.less",
		"- icon colors: https://github.com/jesseweed/seti-ui/blob/master/styles/ui-variables.less",
		"- file associations: https://github.com/jesseweed/seti-ui/blob/master/styles/components/icons/mapping.less",
		"If you want to provide a fix or improvement, please create a pull request against the jesseweed/seti-ui repository.",
		"Once accepted there, we are happy to receive an update request."
	],