[frogend] Settings refactor (#1318)

* yakshave new form field structure

* fully refactor user profile settings form

* use rtk query api for profile settings

* refactor user post settings

* refactor password change form

* refactor admin settings

* FormWithData structure for user forms

* admin actions refactor

* whitespace

* fix user settings data prop

* remove superfluous logging

* cleanup old code

* refactor federation/suspend (overview, detail)

* mostly abstracted (emoji) checkbox list

* refactor parse-from-toot

* refactor custom-emoji, progress on federation bulk

* loading icon styling to prevent big spinny

* refactor federation import-export interface

* cleanup old files

* [chore] Update/add license headers for 2023

* redux fixes

* text-field exports

* appease the linter

* refactor authentication with RTK Query

* fix login/logout state transition weirdness

* fixes/cleanup

* small linter-related fixes

* add eslint license header check, fix existing files

* remove old code, clarify comment

* clarify suspend on subdomains

* collapse if/else

* fa-fw width info comment

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

@@ -0,0 +1,67 @@
+/*
+	GoToSocial
+	Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
+
+	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/>.
+*/
+
+"use strict";
+
+const React = require("react");
+
+const query = require("../../lib/query");
+const { useTextInput, useValue } = require("../../lib/form");
+const useFormSubmit = require("../../lib/form/submit");
+const { TextInput } = require("../form/inputs");
+const MutationButton = require("../form/mutation-button");
+const Loading = require("../loading");
+
+module.exports = function Login({ }) {
+	const form = {
+		instance: useTextInput("instance", {
+			defaultValue: window.location.origin
+		}),
+		scopes: useValue("scopes", "user admin")
+	};
+
+	const [formSubmit, result] = useFormSubmit(
+		form,
+		query.useAuthorizeFlowMutation(),
+		{ changedOnly: false }
+	);
+
+	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"
+			/>
+			<MutationButton label="Login" result={result} />
+		</form>
+	);
+};