Created Plugin Examples (markdown)

Plugin-Examples.md

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+
+## JavaScript Examples
+### Meta Service
+The Meta Service allows you to store your own key-value pairs in the EFMeta table under the database you are using. This is helpful when building a plugin that requires persistent data storage and retrieval. Each key-value pair is stored under a client ID.
+
+```js
+this.manager = manager;
+this.serviceResolver = _serviceResolver;
+
+// Resolve IMetaService to a variable
+this.metaService = this.serviceResolver.ResolveService("IMetaService");
+// Get the owner of the data by client ID
+var owner = this.manager.GetClientService().Get(clientID).Result
+// Store some data under the owner
+this.metaService.AddPersistentMeta("my_data", "My Data Value"), owner).Result
+// Fetch a value by its key
+var data = this.metaService.GetPersistentMeta("my_data", owner).Result.Value;
+```