[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.jsx

@@ -1,54 +0,0 @@
-/*
-	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/>.
-*/
-
-const React = require("react");
-const { Link } = require("wouter");
-
-module.exports = 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 = "div";
-	let href = 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>
-	);
-};