feat: Support embed configuration (#3980)

* wip

* stash

* fix: make authenticationId nullable fk

* fix: apply generics to resolve compile time type errors

* fix: loosen integration settings

* chore: refactor into functional component

* feat: pass integrations all the way to embeds

* perf: avoid re-fetching integrations

* fix: change attr name to avoid type overlap

* feat: use hostname from embed settings in matcher

* Revert "feat: use hostname from embed settings in matcher"

This reverts commit e7485d9cda4dcf45104e460465ca104a56c67ddc.

* feat: refactor  into a class

* chore: refactor url regex formation as a util

* fix: escape regex special chars

* fix: remove in-house escapeRegExp in favor of lodash's

* fix: sanitize url

* perf: memoize embeds

* fix: rename hostname to url and allow spreading entire settings instead of just url

* fix: replace diagrams with drawio

* fix: rename

* fix: support self-hosted and saas both

* fix: assert on settings url

* fix: move embed integrations loading to hook

* fix: address review comments

* fix: use observer in favor of explicit state setters

* fix: refactor useEmbedIntegrations into useEmbeds

* fix: use translations for toasts

Co-authored-by: Tom Moor <tom.moor@gmail.com>

app/scenes/Settings/Slack.tsx

@@ -3,6 +3,7 @@ import { observer } from "mobx-react";
 import * as React from "react";
 import { useTranslation, Trans } from "react-i18next";
 import styled from "styled-components";
+import { IntegrationType } from "@shared/types";
 import Collection from "~/models/Collection";
 import Integration from "~/models/Integration";
 import Button from "~/components/Button";
@@ -124,7 +125,9 @@ function Slack() {
                   <SlackListItem
                     key={integration.id}
                     collection={collection}
-                    integration={integration}
+                    integration={
+                      integration as Integration<IntegrationType.Post>
+                    }
                   />
                 );
               }