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>

server/migrations/20220816070527-change-column-authentication-id-nullable.js

@@ -0,0 +1,17 @@
+"use strict";
+
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.changeColumn("integrations", "authenticationId", {
+      type: Sequelize.UUID,
+      allowNull: true,
+    });
+  },
+
+  async down(queryInterface, Sequelize) {
+    await queryInterface.changeColumn("integrations", "authenticationId", {
+      type: Sequelize.UUID,
+      allowNull: false,
+    });
+  },
+};