[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/lib/navigation/util.ts

@@ -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 { createContext, useContext } from "react";
+const RoleContext = createContext([]);
+const BaseUrlContext = createContext<string>("");
+
+function urlSafe(str) {
+	return str.toLowerCase().replace(/[\s/]+/g, "-");
+}
+
+function useHasPermission(permissions) {
+	const roles = useContext(RoleContext);
+	return checkPermission(permissions, roles);
+}
+
+function checkPermission(requiredPermissisons, user) {
+	// requiredPermissions can be 'false', in which case there are no restrictions
+	if (requiredPermissisons === false) {
+		return true;
+	}
+
+	// or an array of roles, check if one of the user's roles is sufficient
+	return user.some((role) => requiredPermissisons.includes(role));
+}
+
+function useBaseUrl() {
+	return useContext(BaseUrlContext);
+}
+
+export {
+	urlSafe,
+	RoleContext,
+	useHasPermission,
+	checkPermission,
+	BaseUrlContext,
+	useBaseUrl
+};