[chore] Convert some settings / admin panel JS to TypeScript (#2247)

* initial conversion of STUFF to typescript

* more stuff

* update babel deps, include commonjs transform

* update bundler & eslint configuration

* eslint --fix

* upgrade deps

* update docs, build stuff, peripheral stuff

---------

Co-authored-by: f0x <f0x@cthu.lu>

web/source/settings/components/authorization/login.tsx

@@ -0,0 +1,74 @@
+/*
+	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/>.
+*/
+
+import React from "react";
+
+import { useAuthorizeFlowMutation } from "../../lib/query/oauth";
+import { useTextInput, useValue } from "../../lib/form";
+import useFormSubmit from "../../lib/form/submit";
+import { TextInput } from "../form/inputs";
+import MutationButton from "../form/mutation-button";
+import Loading from "../loading";
+
+export default function Login({ }) {
+	const form = {
+		instance: useTextInput("instance", {
+			defaultValue: window.location.origin
+		}),
+		scopes: useValue("scopes", "user admin")
+	};
+
+	const [formSubmit, result] = useFormSubmit(
+		form,
+		useAuthorizeFlowMutation(),
+		{ 
+			changedOnly: false,
+			onFinish: undefined,
+		}
+	);
+
+	if (result.isLoading) {
+		return (
+			<div>
+				<Loading /> Checking instance.
+			</div>
+		);
+	} else if (result.isSuccess) {
+		return (
+			<div>
+				<Loading /> Redirecting to instance authorization page.
+			</div>
+		);
+	}
+
+	return (
+		<form onSubmit={formSubmit}>
+			<TextInput
+				field={form.instance}
+				label="Instance"
+				name="instance"
+			/>
+			<MutationButton
+				label="Login"
+				result={result}
+				disabled={false}
+			/>
+		</form>
+	);
+}