docs: add wait_ms parameter to SmartCrawler documentation

Document the new wait_ms parameter for the crawl endpoint, matching
SDK changes in scrapegraph-py#80 and scrapegraph-js#6.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: VinciGit00

api-reference/endpoint/smartcrawler/start.mdx

@@ -37,8 +37,9 @@ Content-Type: `application/json`
   },
   "sitemap": "boolean",
   "render_heavy_js": "boolean",
-  "stealth": "boolean"
-  "webhook_url": str
+  "stealth": "boolean",
+  "webhook_url": "string",
+  "wait_ms": "integer"
 }
 ```
 
@@ -60,7 +61,8 @@ Content-Type: `application/json`
 | sitemap | boolean | No | false | Use sitemap.xml for discovery |
 | render_heavy_js | boolean | No | false | Enable heavy JavaScript rendering |
 | stealth | boolean | No | false | Enable stealth mode to bypass bot protection using advanced anti-detection techniques. Adds +4 credits to the request cost |
-| webhook_url | str | No | None | Webhook URL to send the job result to. When provided, a signed webhook notification will be sent upon job completion. See [Webhook Signature Verification](#webhook-signature-verification) below.
+| webhook_url | string | No | None | Webhook URL to send the job result to. When provided, a signed webhook notification will be sent upon job completion. See [Webhook Signature Verification](#webhook-signature-verification) below. |
+| wait_ms | integer | No | 3000 | Milliseconds to wait before scraping each page. Useful for pages with heavy JavaScript rendering that need extra time to load. |
 
 ### Example
 ```json

services/smartcrawler.mdx

@@ -107,6 +107,7 @@ curl -X 'POST' \
 | rules             | object  | No       | Crawl rules object with optional fields: `exclude` (array of regex URL patterns), `include_paths` (array of path patterns to include, supports wildcards `*` and `**`), `exclude_paths` (array of path patterns to exclude, takes precedence over `include_paths`), `same_domain` (boolean, default: true). See below for details. |
 | sitemap           | bool    | No       | Use sitemap.xml for discovery (default: false). |
 | webhook_url       | string  | No       | URL to receive webhook notification on job completion. |
+| wait_ms           | int     | No       | Milliseconds to wait before scraping each page. Useful for pages with heavy JavaScript rendering that need extra time to load (default: 3000). |
 
 
 <Note>
@@ -463,6 +464,7 @@ POST https://api.scrapegraphai.com/v1/crawl
 | max_pages        | int     | No       | Max pages to crawl |
 | rules            | object  | No       | Crawl rules object with optional fields: `exclude` (regex URL patterns), `include_paths` (path patterns to include), `exclude_paths` (path patterns to exclude), `same_domain` (boolean) |
 | sitemap          | bool    | No       | Use sitemap.xml |
+| wait_ms          | int     | No       | Milliseconds to wait before scraping each page. Useful for pages with heavy JavaScript rendering (default: 3000). |
 
 #### Response Format
 ```json