update eslint stack to ts-compatible v9

web/source/eslint.config.cjs

@@ -0,0 +1,39 @@
+/*
+	GoToSocial
+	Copyright (C) GoToSocial Authors admin@gotosocial.org
+	SPDX-License-Identifier: AGPL-3.0-or-later
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+module.exports = [
+	{
+		files: ["**/*.ts", "**/*.tsx"],
+		languageOptions: {
+			parserOptions: {
+				project: true,
+				ecmaFeatures: {
+					jsx: true
+				}
+			}
+		},
+		plugins: {
+			"license-header": require("eslint-plugin-license-header")
+		},
+		rules: {
+			"license-header/header": ["error", __dirname + "/.license-header.js"]
+		}
+	},
+	...require("@f0x52/eslint-config")
+];