[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>

CONTRIBUTING.md

@@ -8,6 +8,18 @@ do so, please [let us know how we can improve it](https://github.com/coralprojec
 By contributing to this project you agree to the
 [Code of Conduct](CODE_OF_CONDUCT.md).
 
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+## Table of Contents
+
+- [What should I Contribute?](#what-should-i-contribute)
+- [Writing Code](#writing-code)
+  - [When should I create an issue?](#when-should-i-create-an-issue)
+  - [What should I include?](#what-should-i-include)
+- [Localization](#localization)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
 ## What should I Contribute?
 
 There are at least three ways to contribute to Coral: