Add repository webhook resource (#28)

Co-authored-by: techknowlogick <techknowlogick@noreply.gitea.com>
Reviewed-on: https://gitea.com/gitea/terraform-provider-gitea/pulls/28
Reviewed-by: techknowlogick <techknowlogick@noreply.gitea.com>
Co-authored-by: Petar Nikolovski <petar.nikolovski@protonmail.com>
Co-committed-by: Petar Nikolovski <petar.nikolovski@protonmail.com>

docs/resources/repository_webhook.md

@@ -0,0 +1,36 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "gitea_repository_webhook Resource - terraform-provider-gitea"
+subcategory: ""
+description: |-
+  This resource allows you to create and manage webhooks for repositories.
+---
+
+# gitea_repository_webhook (Resource)
+
+This resource allows you to create and manage webhooks for repositories.
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `active` (Boolean) Set webhook to active, e.g. `true`
+- `branch_filter` (String) Set branch filter on the webhook, e.g. `"*"`
+- `content_type` (String) The content type of the payload. It can be `json`, or `form`
+- `events` (List of String) A list of events that will trigger the webhool, e.g. `["push"]`
+- `name` (String) Repository name
+- `type` (String) Webhook type, e.g. `gitea`
+- `url` (String) Target URL of the webhook
+- `username` (String) User name or organization name
+
+### Optional
+
+- `secret` (String) Webhook secret
+
+### Read-Only
+
+- `created_at` (String) Webhook creation timestamp
+- `id` (String) The ID of this resource.