docs(blocks): complete block documentation migration cleanup

Move remaining block docs to block-integrations/ subdirectory:
- Delete old docs from docs/integrations/ root
- Add new docs under docs/integrations/block-integrations/
- Add guides/ directory with LLM and voice provider docs
- Update SUMMARY.md with correct navigation structure

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/integrations/block-integrations/generic_webhook/triggers.md

@@ -0,0 +1,41 @@
+# Generic Webhook Triggers
+<!-- MANUAL: file_description -->
+Blocks for receiving and processing generic webhook payloads from external services.
+<!-- END MANUAL -->
+
+## Generic Webhook Trigger
+
+### What it is
+This block will output the contents of the generic input for the webhook.
+
+### How it works
+<!-- MANUAL: how_it_works -->
+This block creates a webhook endpoint that receives and outputs any incoming HTTP payload. When external services send data to this webhook URL, the block triggers and outputs the complete payload as a dictionary.
+
+Constants can be configured to pass additional static values alongside the dynamic webhook data.
+<!-- END MANUAL -->
+
+### Inputs
+
+| Input | Description | Type | Required |
+|-------|-------------|------|----------|
+| constants | The constants to be set when the block is put on the graph | Dict[str, Any] | No |
+
+### Outputs
+
+| Output | Description | Type |
+|--------|-------------|------|
+| error | Error message if the operation failed | str |
+| payload | The complete webhook payload that was received from the generic webhook. | Dict[str, Any] |
+| constants | The constants to be set when the block is put on the graph | Dict[str, Any] |
+
+### Possible use case
+<!-- MANUAL: use_case -->
+**External Integrations**: Receive data from any third-party service that supports webhooks.
+
+**Custom Triggers**: Create custom workflow triggers from external systems or internal tools.
+
+**Event Processing**: Capture and process events from IoT devices, payment processors, or notification services.
+<!-- END MANUAL -->
+
+---