[CORL-687] Webhooks (#2738)

* feat: initial webhook impl

* feat: added support for key rotation

* feat: harmonized fetcher

* feat: added expired secrets cleaning

* feat: event system refactor

* feat: added story event

* feat: simplfiied webhook handler

* feat: added ref's to locations where user events can be added

* feat: added UI to support webhooks

* fix: renaming some Webhook -> WebhookEndpoint

* fix: review comments to adjuist flow

* feat: added localizations

* fix: linting, updated snapshots

* fix: adapted for new fluent

* fix: rearranged folders

* fix: linting

* feat: added webhooks documentation

* feat: improved toc generation

* feat: added some tests to webhooks

* fix: chain transition hooks

* feat: added tests around webhook ui

* fix: renamed events

* fix: adjusted circle markdown linting

* fix: adjusted doctoc script call

* review: review fixes

* review: review comments

* review: adjusted signing secret confirmation

* review: adjusted styles to harmonize button usage

* fix: updated snapshots and tests

* review: move form out of webhooks

Moved the form out of the webhooks by relocating the layout used for the
route associated with the configure routes.

* fix: fixed bugs and snapshots with tests

* feat: revised slack message format to use block api

* fix: fixed a small text bug

Co-authored-by: Vinh <vinh@vinh.tech>
Co-authored-by: Kim Gardner <kgardnr@gmail.com>

package.json

@@ -25,8 +25,8 @@
     "build:client": "ts-node --transpile-only ./scripts/build.ts",
     "build:server": "gulp server",
     "migration:create": "ts-node --transpile-only ./scripts/migration/create.ts",
-    "doctoc": "doctoc --title='## Table of Contents' --github README.md",
-    "docs:events": "ts-node ./scripts/generateEventDocs.ts ./src/core/client/stream/events.ts ./events.md",
+    "docs:events": "ts-node ./scripts/generateEventDocs.ts ./src/core/client/stream/events.ts ./CLIENT_EVENTS.md",
+    "doctoc": "doctoc --maxlevel=3 --title '## Table of Contents' README.md CLIENT_EVENTS.md CONTRIBUTING.md WEBHOOKS.md",
     "generate": "npm-run-all generate:css-types generate:schema generate:relay",
     "generate-persist": "npm-run-all generate:css-types generate:schema generate:relay-persist",
     "generate:css-types": "tcm src/core/client/",
@@ -400,8 +400,12 @@
     "src/core/server/graph/schema/schema.graphql": [
       "graphql-schema-linter"
     ],
-    "{src/core/client/stream/events.ts,scripts/generateEventDocs.ts,events.md}": [
+    "{src/core/client/stream/events.ts,scripts/generateEventDocs.ts,CLIENT_EVENTS.md}": [
       "npm run docs:events -- --verify"
+    ],
+    "{README,CLIENT_EVENTS,CONTRIBUTING,WEBHOOKS}.md": [
+      "npm run doctoc",
+      "git add"
     ]
   },
   "bundlesize": [