docs: Continuous Deployment tools (#123)

Hi @lunny! [As requested](https://discord.com/channels/322538954119184384/561007778139734027/1131595750132961330), some tools to help perform Continuous Deployment when integrating gitea with woodpecker (or any other CI tool).

Reviewed-on: https://gitea.com/gitea/awesome-gitea/pulls/123
Co-authored-by: lonix1 <lonix1@noreply.gitea.com>
Co-committed-by: lonix1 <lonix1@noreply.gitea.com>

README.md

@@ -69,6 +69,8 @@ A curated list of awesome projects related to Gitea.
 - [Renovate](https://github.com/renovatebot/renovate) - Gitea compatible configurable universal dependability update tool
 - [soba](https://github.com/jonhadfield/soba) - scheduled backups of user/organization Gitea repositories with change detection.
 - [Tea Runner](https://github.com/DavesCodeMusings/tea-runner) - A minimalist Python Flask app that uses Gitea webhooks to perform actions.
+- [webhook](https://github.com/adnanh/webhook) - webhook is a lightweight incoming webhook server to run shell commands. Useful for running Continuous Deployment pipeline steps.
+- [webhookd](https://github.com/ncarlier/webhookd) - A very simple webhook server launching shell scripts. Useful for running Continuous Deployment pipeline steps.
 - [woodpecker](https://github.com/woodpecker-ci/woodpecker) - An opinionated fork of the Drone CI system. Built-in Gitea support. (see [docs](https://woodpecker-ci.org/docs/administration/vcs/gitea))
 - [yojo](https://sr.ht/~emersion/yojo/) - A CI bridge from Gitea to SourceHut.