[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/redux/oauth.js

@@ -0,0 +1,48 @@
+/*
+	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 { createSlice } = require("@reduxjs/toolkit");
+
+module.exports = createSlice({
+	name: "oauth",
+	initialState: {
+		loginState: 'none'
+	},
+	reducers: {
+		setInstance: (state, { payload }) => {
+			return {
+				...state,
+				...payload /* overrides instance, registration keys */
+			};
+		},
+		authorize: (state) => {
+			state.loginState = "callback";
+		},
+		setToken: (state, { payload }) => {
+			state.token = `${payload.token_type} ${payload.access_token}`;
+			state.loginState = "login";
+		},
+		remove: (state, { _payload }) => {
+			delete state.token;
+			delete state.registration;
+			state.loginState = "logout";
+		}
+	}
+});