New adapter: Flipp (#4551)

* OFF-488 createprebid documentation for flipp bidder

* Update flipp.md

* OFF-499 add options object to documentation (#2)

* add optional ip bidder param

* add additional allowed options

* add missing metadata fields and remove ip from request

* add additional description to userKey

---------

Co-authored-by: Hasan Kanjee <hasankanjee@flipp.com>
Co-authored-by: Matt Mohan <matt.mohan@flipp.com>

dev-docs/bidders/flipp.md

@@ -0,0 +1,43 @@
+---
+layout: bidder
+title: flipp
+description: Prebid Flipp Bidder Adapter
+biddercode: flipp
+media_types: banner
+pbjs: false
+pbs: true
+gdpr_supported: false
+usp_supported: false
+coppa_supported: false
+schain_supported: false
+floors_supported: false
+userIds: none
+prebid_member: false
+safeframes_ok: true
+deals_supported: false
+pbs_app_supported: false
+fpd_supported: false
+multiformat_supported: will-not-bid
+ortb_blocking_supported: false
+---
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name          | Scope    | Description  | Example   | Type     |
+|---------------|----------|--------------|-----------|----------|
+| `publisherNameIdentifier`      | required | Publisher name identifier | `test-publisher-name` | `string` |
+| `creativeType` | required | Type of the creative | `NativeX` | `NativeX\|DTX` |
+| `siteId` | required | ID associated with the site | `123456` | `integer` |
+| `zoneIds` | optional | Zones to request from bidder | `[789, 123]` | `array[integer]` |
+| `userKey` | optional | User Key to power experience optimization and frequency capping. Publishers: please confirm with legal counsel before using this feature. | `4188d8a3-22d1-49cb-8624-8838a22562bd` | `uuidv4` |
+| `options` | optional | Additional integration specific context | `options: {   "startCompact": true }` | `map[string]interface{}` |
+
+Current available integration options are as follows:
+
+{: .table .table-bordered .table-striped }
+| Name          | Scope    | Description  | Example   | Type     |
+|---------------|----------|--------------|-----------|----------|
+| `startCompact`      | optional | Height of the experience will be reduced | `true` | `boolean` |
+| `dwellExpand`      | optional | Auto expand the experience after a certain time passes | `true` | `boolean` |
+| `contentCode`      | optional | Force show a certain experience. Generally used for testing and debugging purposes. | `publisher-test` | `string` |