added mediafilterRtdProvider.md documentation (#5022)

* added mediafilterRtdProvider.md

* markdown linter fixes

* fixed description

* reviewed after feedback

* fixed indent with markdownlint

* couple of minor fixes

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Co-authored-by: bretg <[email protected]>

dev-docs/modules/mediafilterRtdProvider.md

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+---
+layout: page_v2
+title: The Media Trust Real-Time Ad Defense
+display_name: The Media Trust Real-Time Ad Defense
+description: Stop malware, redirects, scams, offensive ad content, heavy ads, and more from ruining your audience's experience.
+page_type: module
+module_type: rtd
+module_code : mediafilterRtdProvider
+enable_download : true
+vendor_specific: true
+sidebarType : 1
+---
+
+# The Media Trust Real-Time Ad Defense
+
+## Overview
+
+As malvertising, scams, and controversial and offensive ad content proliferate across the digital media ecosystem, publishers need advanced controls to both shield audiences from malware attacks and ensure quality site experience. Via a speedy script, The Media Trust empowers publisher Ad/Revenue Operations teams to block malware, high-risk ad platforms, heavy ads, ads with sensitive or objectionable content, and custom lists (e.g., competitors)—all in real-time. Customizable replacement code calls for a new ad to ensure impressions are still monetized.
+
+{: .alert.alert-warning :}
+To start using this module, please contact [The Media Trust](https://mediatrust.com/how-we-help/media-filter/) to get a script and configuration hash for module configuration.
+
+## Integration
+
+1. Build Prebid bundle with The Media Filter module included.  
+
+    ```bash
+    gulp build --modules=mediafilterRtdProvider
+    ```
+
+2. Include the bundled script in your application.
+
+## Configuration
+
+Add configuration entry to `realTimeData.dataProviders` for The Media Filter module.
+
+```javascript
+pbjs.setConfig({
+    realTimeData: {
+        dataProviders: [{
+            name: 'mediafilter',
+            params: {
+                // Replace <configurationHash> with the configuration hash provided by your sales rep
+                configurationHash: '<configurationHash>'
+            }
+        }]
+    }
+});
+```