Aso Bid Adapter: add bidgency alias (prebid#4636)

Co-authored-by: dev <[email protected]>

dev-docs/bidders/bidgency.md

@@ -0,0 +1,42 @@
+---
+layout: bidder
+title: Bidgency Group
+description: Bidgency Group Bid Adapter
+biddercode: bidgency
+gdpr_supported: true
+usp_supported: true
+media_types: video
+safeframes_ok: true
+deals_supported: false
+pbjs: true
+pbs: false
+floors_supported: true
+schain_supported: true
+multiformat_supported: will-bid-on-one
+userIds: all
+sidebarType: 1
+---
+### Note:
+
+The Bidgency Group adapter requires approval and setup. Please reach out to [email protected] or visit us at [bidgency.com](https://bidgency.com) for more details.
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name          | Scope    | Description      | Example                     | Type      |
+|---------------|----------|------------------|-----------------------------|-----------|
+| `server`      | required | Server endpoint  | `https://srv.bidgx.com`     | `String`  |
+| `zone`        | required | Zone ID          | `73815`                     | `Integer` |
+
+#### Video Caching
+
+Note that the Bidgency Group adapter expects a client-side Prebid Cache to be enabled for video bidding.
+
+```js
+pbjs.setConfig({
+    usePrebidCache: true,
+    cache: {
+        url: 'https://prebid.adnxs.com/pbc/v1/cache'
+    }
+});
+```