New Adapter: ElementalTv: (prebid#6374)

* Update Adoppler/ElementaTv:

1)Adoppler adapter now has new name ElementalTv
2)Left support adoppler adapter name

* Update Adoppler/ElementaTv:

* Update Adoppler/ElementaTv:

* Update Adoppler/ElementaTv:

* Update Adoppler/ElementaTv:

* Update Adoppler/ElementaTv:

* Update Adoppler/ElementaTv

* Update Adoppler/ElementaTv

Added gpp_sids

Author: pavel-ptashyts

dev-docs/bidders/adoppler.md

@@ -1,16 +1,24 @@
 ---
 layout: bidder
 title: Adoppler
-pbs: true
-media_types: video
+description: This bidder has been renamed to ElementalTV.
 biddercode: adoppler
+pbs: true
+pbjs: false
 sidebarType: 1
 ---
 
-### Bid Params
+### Deprecated
+
+The **Adoppler** bidder has been renamed to **ElementalTV**.
+
+Please use the **ElementalTV** bidder documentation and biddercode going forward:
+
+- **Docs:** `/dev-docs/bidders/elementaltv.html`
+- **Bidder code:** `elementaltv`
+
+### Notes
 
-{: .table .table-bordered .table-striped }
-| Name       | Scope    | Description            | Example | Type     |
-|------------|----------|------------------------|---------|----------|
-| adunit | required | AdUnit to bid against | 'test' | string |
-| client | optional | Client name | 'ads' | string |
+- `adoppler` is maintained as an alias for backward compatibility.
+- New integrations should use `elementaltv`.
+ 

dev-docs/bidders/elementaltv.md

@@ -0,0 +1,40 @@
+---
+layout: bidder
+title: ElementalTV
+description: Prebid ElementalTV Bidder Adapter
+biddercode: elementaltv
+pbs: true
+pbjs: false
+media_types: banner, video, native
+pbs_app_supported: true
+schain_supported: true
+coppa_supported: true
+deals_supported: true
+usp_supported: true
+gpp_supported: true
+gpp_sids: usnat, usstate_all, usp
+dsa_supported: false
+multiformat_supported: will-bid-on-any
+sidebarType: 1
+---
+
+### Registration
+
+The ElementalTV bidder adapter requires prior setup. Please contact us at <support@elementaltv.com>.
+
+### OpenRTB Version
+
+References to the OpenRTB specification in this document assume **OpenRTB 2.6**.
+
+### Prebid Server Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name    | Scope    | Description                                  | Example      | Type     |
+|---------|----------|----------------------------------------------|--------------|----------|
+| `adunit`| required | Ad Unit ID or Supply Source reference to bid against | `'test'` or `'SSP:12345'` | `string` |
+
+### Notes
+
+- `adunit` can reference either:
+  - an **Ad Unit ID** (pass the ID as-is), or
+  - a **Supply Source reference** using the prefix format `SSP:<supply_source_id>` (e.g., `SSP:12345`).