Public Good - new adapter (prebid#6258)

* Public Good new adapter

* add some additional data

Author: aaronkoss

dev-docs/bidders/publicgood.md

@@ -0,0 +1,36 @@
+---
+layout: bidder
+title: Public Good
+description: Public Gppd Bid Adapter
+biddercode: publicgood
+tcfeu_supported: false
+dsa_supported: false
+gvl_id: none
+usp_supported: false
+coppa_supported: false
+gpp_sids: none
+schain_supported: false
+dchain_supported: false
+userId: none
+media_types: banner
+safeframes_ok: true
+deals_supported: false
+floors_supported: false
+fpd_supported: false
+pbjs: true
+pbs: false
+prebid_member: false
+multiformat_supported: will-bid-on-one
+ortb_blocking_supported: false
+privacy_sandbox: no
+sidebarType: 1
+---
+
+### Bid params
+
+{: .table .table-bordered .table-striped }
+
+| Name        | Scope    | Description                                                                                                  | Example                       | Type          |
+|-------------|----------|--------------------------------------------------------------------------------------------------------------|-------------------------------|---------------|
+| `partnerId` | required | Publisher ID                                                                                                 | `'prebid-test'`               | `string`      |
+| `slotId`    | required | Slot ID = 'all' unless negotiated otherwise                                                                  | `'all'`                       | `string`      |