New adapter: Performist (prebid#5968)

* new adapter performist.md

* add empty line and false for pbjs

* Update performist.md

fix

* Update performist.md

Modify required fields

* Update performist.md

fix host

* Update performist.md

Host to Optional

* Update performist.md

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Co-authored-by: mderevyanko <mderevyanko24@gmail.com>
Co-authored-by: maksimD24 <129727954+maksimD24@users.noreply.github.com>
Co-authored-by: Alexander Pykhteyev <alex.pykhteyev@gmail.com>

Author: 3 people

dev-docs/bidders/performist.md

@@ -0,0 +1,37 @@
+---
+layout: bidder
+title: Performist
+description: Prebid Performist Bidder Adaptor
+biddercode: performist
+pbjs: false
+pbs: true
+media_types: video, banner
+userIds: all
+fpd_supported: false
+tcfeu_supported: false
+usp_supported: true
+coppa_supported: true
+schain_supported: true
+prebid_member: false
+ortb_blocking_supported: true
+multiformat_supported: will-bid-on-one
+floors_supported: false
+aliasCode: limelightDigital
+sidebarType: 1
+---
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+
+| Name          | Scope    | Description                                                   | Example                | Type      |
+|:--------------|:---------|:--------------------------------------------------------------|:-----------------------|:----------|
+| `publisherId` | required | Publisher ID                                                  | `'12345'`              | `string`  |
+| `custom1`     | optional | Custom targeting field 1                                      | `'custom1'`            | `string`  |
+| `custom2`     | optional | Custom targeting field 2                                      | `'custom2'`            | `string`  |
+| `custom3`     | optional | Custom targeting field 3                                      | `'custom3'`            | `string`  |
+| `custom4`     | optional | Custom targeting field 4                                      | `'custom4'`            | `string`  |
+| `custom5`     | optional | Custom targeting field 5                                      | `'custom5'`            | `string`  |
+
+Performist server-side Prebid Server adapter requires only `publisherId` and `host` parameters.
+Performist server-side Prebid Server adapter supports only `banner`, `video`, `audio`, `native` media types.