[feature] Admin accounts endpoints; approve/reject sign-ups (#2826)

* update settings panels, add pending overview + approve/deny functions

* add admin accounts get, approve, reject

* send approved/rejected emails

* use signup URL

* docs!

* email

* swagger

* web linting

* fix email tests

* wee lil fixerinos

* use new paging logic for GetAccounts() series of admin endpoints, small changes to query building

* shuffle useAccountIDIn check *before* adding to query

* fix parse from toot react error

* use `netip.Addr`

* put valid slices in globals

* optimistic updates for account state

---------

Co-authored-by: kim <grufwub@gmail.com>

web/source/settings/admin/reports/username.tsx

@@ -0,0 +1,54 @@
+/*
+	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 { Link } from "wouter";
+
+export default function Username({ user, link = true }) {
+	let className = "user";
+	let isLocal = user.domain == null;
+
+	if (user.suspended) {
+		className += " suspended";
+	}
+
+	if (isLocal) {
+		className += " local";
+	}
+
+	let icon = isLocal
+		? { fa: "fa-home", info: "Local user" }
+		: { fa: "fa-external-link-square", info: "Remote user" };
+
+	let Element: any = "div";
+	let href: any = null;
+
+	if (link) {
+		Element = Link;
+		href = `/settings/admin/accounts/${user.id}`;
+	}
+
+	return (
+		<Element className={className} to={href}>
+			<span className="acct">@{user.account.acct}</span>
+			<i className={`fa fa-fw ${icon.fa}`} aria-hidden="true" title={icon.info} />
+			<span className="sr-only">{icon.info}</span>
+		</Element>
+	);
+}