PAIR: adds TechLab version documentation (#5785)

* adds techlab pair documentation

* adds matcher/inserter config for pair module

---------

Co-authored-by: Miguel Morales <[email protected]>

Author: therevoltingx

dev-docs/modules/userid-submodules/open-pair.md

@@ -0,0 +1,91 @@
+---
+layout: userid
+title: Open PAIR ID
+description: Open PairId User ID sub-module
+useridmodule: openPairIdSystem
+bidRequestUserId: openPairId
+eidsource: pair-protocol.com
+example: '"nnjbddb46374634mndjhd78jh"'
+---
+
+Originally developed by Google and subsequently donated to the industry.
+This version supports single and two Data Clean Room setups, in which the advertiser and publisher use different clean rooms.
+
+(Publisher Advertiser Identity Reconciliation) is a secure and privacy-forward way for enabling advertisers and publishers to reconcile their
+first-party data for marketing use cases via advanced data encryption methods without the
+reliance on third-party cookies.
+
+PAIR can help advertisers and publishers maintain control of first-party data while ensuring there is no pooling of data, no leakage of data, no leakage of insights, durablility for the future using secure encryption methods, and no user tracking across publishers.
+
+See this [page](https://iabtechlab.com/pair/) for more information about the PAIR protocol.
+
+Add it to your Prebid.js package with:
+
+```bash
+gulp build --modules=openPairIdSystem
+```
+
+## PAIR ID Configuration
+
+{: .table .table-bordered .table-striped }
+
+| Param under userSync.userIds[] | Scope | Type | Description | Example |
+| --- | --- | --- | --- | --- |
+| name | Required | String | The name of PAIR ID user ID module. | `"openPairId"` |
+| params | Optional | Object | Container of all module params. Each entry can be used to configured a specific clean room. |  |
+
+## PAIR ID Examples
+
+Publishers manage PAIR Ids themselves can store pairIds as a byte64 encoded array of ids in local storage and/or 1st party cookies entry `pairId`.
+
+```javascript
+
+// should have byte64 value ready in 'pairId' local storage/cookie entry
+
+pbjs.setConfig({
+  userSync: {
+    userIds: [{
+      name: 'openPairId'
+    }]
+  }
+});
+```
+
+Clean rooms may use specific storage keys, this version supports specifying the storage key for any clean room such as the following example.
+
+```javascript
+
+// value in 'pairId' local storage/cookie entry will be combined with ids provided by cleanroom liveramp
+pbjs.setConfig({
+  userSync: {
+    userIds: [
+      {
+        name: 'openPairId',
+        params: {
+          cleanRoomVendor: {
+            storageKey: '_storage_key'
+          }
+        }
+      }
+    ]
+  }
+});
+```
+
+As per the PAIR specification, you can define the inserter and matcher.
+
+```javascript
+pbjs.setConfig({
+  userSync: {
+    userIds: [
+      {
+        name: 'openPairId',
+        params: {
+          inserter: 'some-domain.com',
+          matcher: 'another-domain.com'
+        }
+      }
+    ]
+  }
+});
+```