Updated README

[rbnswartz]

This pull request updates the README.md to document the new outgoing webhook dispatch feature and related infrastructure changes, as well as a new utility for generating verse count files. The documentation now includes details on how external systems can register for webhooks, the storage requirements for webhook registrations, and usage instructions for the new verse counting utility.

Key documentation updates:

Outgoing Webhook Dispatch:

• Added a new section describing how external systems can register webhook endpoints to receive notifications for WACSEvent and RepoAnalysisResult messages, including the API endpoints (RegisterWebhook, UnregisterWebhook), storage in Azure Table Storage, and the dispatching mechanism via WebhookDispatcher with retry logic. [1] [2] [3] [4]
• Updated the message topics table to show that WebhookDispatcher is now a consumer of WACSEvent and RepoAnalysisResult topics.
• Enhanced the architecture diagram to illustrate webhook registration, storage, and event dispatch flows.

New Utility:

• Added documentation for the CreateVerseCountsFromRepo utility, including its purpose, usage instructions, and how it supports reference verse count data generation.

Configuration:

• Updated configuration requirements to include WebhookStorageConnectionString for both the main service and the worker, reflecting the new dependency on Azure Table Storage for webhook registrations. [1] [2]