Add Engerio bidder docs (#6576)

* Add Engerio bidder docs

* Update dev-docs/bidders/engerio.md

---------

Co-authored-by: Muki Seiler <muuki88@users.noreply.github.com>

Author: david-thinkeasy

dev-docs/bidders/engerio.md

@@ -0,0 +1,37 @@
+---
+layout: bidder
+title: Engerio
+description: Prebid Engerio Bidder Adapter
+biddercode: engerio
+tcfeu_supported: false
+dsa_supported: false
+gvl_id: none
+usp_supported: false
+coppa_supported: false
+gpp_sids: none
+schain_supported: false
+dchain_supported: false
+media_types: banner
+safeframes_ok: true
+deals_supported: false
+floors_supported: false
+fpd_supported: false
+pbjs: true
+pbs: false
+prebid_member: false
+multiformat_supported: will-not-bid
+ortb_blocking_supported: false
+privacy_sandbox: no
+sidebarType: 1
+---
+
+### Note
+
+The Engerio adapter requires an active publisher account. Please contact [info@thinkeasy.cz](mailto:info@thinkeasy.cz) to obtain an ad slot code (`adUnitCode`) for your placement.
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name | Scope | Description | Example | Type |
+|------|-------|-------------|---------|------|
+| `adUnitCode` | required | The ad slot identifier configured in the Engerio admin for this placement. | `'homepage-sidebar'` | `string` |