New adapter - Playstream (#6454)

* New adapter - Playstream

* update Playstream bidder documentation: add missing gvl_id and remove deprecated params

* add missing line break in Playstream bidder documentation

---------

Co-authored-by: Yash Chotaliya <yashc@adsolut.in>

Author: KushAdsolut

dev-docs/bidders/playstream.md

@@ -0,0 +1,137 @@
+---
+layout: bidder
+title: Playstream Media
+description: Prebid.js Playstream Media Bid Adapter
+biddercode: playstream
+pbjs: true
+media_types: video, banner
+multiformat_supported: will-bid-on-one
+userIds: all
+fpd_supported: true
+tcfeu_supported: true
+gvl_id: 1524
+usp_supported: some
+coppa_supported: some
+schain_supported: true
+prebid_member: false
+ortb_blocking_supported: some
+floors_supported: true
+sidebarType: 1
+---
+
+## Description
+
+**Playstream Media** Prebid.js adapter supports **banner** and **video** demand using an **OpenRTB 2.x** request/response flow.
+
+The adapter sends a **POST** request to:
+
+- `https://<host>/server/adserver/hb?adUnitId=<adUnitId>&publisherId=<publisherId>`
+
+> Note: `host` should be a hostname only (no protocol, no path). The adapter uses HTTPS.
+>
+> Note: `getUserSyncs()` currently returns an empty array (no user sync pixels are triggered by this adapter).
+
+## Bid Params
+
+{: .table .table-bordered .table-striped }
+
+| Name            | Scope    | Description                                                              | Example                        | Type     |
+|:----------------|:---------|:-------------------------------------------------------------------------|:-------------------------------|:---------|
+| `host`          | required | Playstream bidder host (hostname only; no protocol/path)                 | `'exchange.ortb.net'`          | `string` |
+| `adUnitId`      | required | adUnit ID from Playstream Platform                                       | `'697871ac0ec1c6100e1f9121'`   | `string` |
+| `publisherId`   | required | Publisher ID from Playstream Platform                                    | `'697871ac0ec1c6100e1f9122'`   | `string` |
+| `type`          | required | Type of request: `'video'` or `'banner'`                                 | `'banner'`                     | `string` |
+| `price`         | optional | Bid floor in `USD` only (defaults to Playstream dashboard configuration) | `0.5`                          | `number` |
+| `ip`            | optional | User IP (targeting)                                                      | `'192.168.1.1'`                | `string` |
+| `maxAdDuration` | optional | Max ad pod duration (seconds)                                            | `120`                          | `number` |
+| `maxSlotPerPod` | optional | Max ad slots per pod                                                     | `3`                            | `number` |
+
+## Required Params
+
+Playstream Media client-side Prebid.js adapter requires only:
+
+- `host`
+- `adUnitId`
+- `publisherId`
+- `type`
+
+## Supported Media Types
+
+This adapter supports only:
+
+- `banner`
+- `video`
+
+It does **not** support `native` or `audio`.
+
+## First Party Data and User IDs
+
+- **FPD (First Party Data):** When available, the adapter forwards `bidderRequest.ortb2` and impression-level `bidRequest.ortb2Imp` into the OpenRTB request (`site/app/user/device/regs/ext`).
+- **User IDs:** If your Prebid build includes User ID modules, their EIDs typically appear under `ortb2.user.ext.eids` and are forwarded in the OpenRTB request.
+
+## Privacy Support Notes
+
+- **TCF-EU (GDPR):** If Prebid populates consent into `ortb2.regs` / `ortb2.user.ext.consent`, the adapter forwards it.
+- **USP/CCPA & COPPA:** If these signals are present in `ortb2.regs` (or related fields), they will be forwarded as part of the OpenRTB request.
+
+## schain Support
+
+If the `schain` module is enabled in Prebid, the adapter forwards supply chain information in the OpenRTB request (typically `source.ext.schain`).
+
+## Sample Bids
+
+### Display
+
+Replace the values below with the Host / Ad Unit ID / Publisher ID shared by the Admin/Support team. Do not use the sample IDs in production.
+
+```javascript
+var adUnits = [
+    {
+        code: 'div-1',
+        mediaTypes: {
+            banner: { 
+                sizes: [[300, 250], [728, 90]]
+            }
+        },
+        sizes: [[300, 250], [728, 90]],
+        bids: [{
+            bidder: 'playstream',
+            params: {
+                host: 'asia-southeast.ortb.net',            // Provided by Admin/Support team
+                adUnitId: '697871ac0ec1c6100e1f9121',       // Provided by Admin/Support team
+                publisherId: '697871ac0ec1c6100e1f9122',    // Provided by Admin/Support team
+                type: 'banner',
+            }
+        }]
+    }
+];
+```
+
+### Video
+
+Replace the values below with the Host / Ad Unit ID / Publisher ID shared by the Admin/Support team. Do not use the sample IDs in production.
+
+```javascript
+var adUnits = [
+    {
+        code: 'div-2',
+        mediaTypes: {
+            video: {
+                context: 'instream',
+                playerSize: [640, 360]
+            }
+        },
+        sizes: [640, 360],
+        bids: [{
+            bidder: 'playstream',
+            params: {
+                host: 'asia-southeast.ortb.net',            // Provided by Admin/Support team
+                adUnitId: '697871ac0ec1c6100e1f9121',       // Provided by Admin/Support team
+                publisherId: '697871ac0ec1c6100e1f9122',    // Provided by Admin/Support team
+                type: 'video',
+                price: 0.4
+            }
+        }]
+    }
+];
+```