[ADF-3792] Added title metadata to Markdown files (#4088)

docs/tutorials/basic-theming.md

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+Title: Basic theming
 Level: Beginner
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docs/tutorials/content-metadata-component.md

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+Title: Content metadata component
 Level: Advanced
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docs/tutorials/creating-javascript-app-using-alfresco-js-api.md

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+Title: Creating an Alfresco JavaScript app
 Level: Basic
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docs/tutorials/creating-the-app-using-yeoman.md

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+Title: Creating an ADF app using Yeoman
 Level: Basic
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docs/tutorials/creating-your-first-adf-application.md

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+Title: Creating your first ADF app
 Level: Basic
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docs/tutorials/customising-login.md

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+Title: Customizing the Login component
 Level: Intermediate
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docs/tutorials/new-component.md

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+Title: Adding a new component
 Level: Basic
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docs/tutorials/new-view.md

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+Title: Adding a new view
 Level: Beginner
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docs/tutorials/preparing-environment.md

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+Title: Preparing the development environment
 Level: Beginner
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docs/tutorials/using-components.md

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+Title: Using ADF components
 Level: Basic
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docs/tutorials/working-with-data-table.md

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+Title: Working with a DataTable
 Level: Intermediate
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docs/tutorials/working-with-nodes-api-service.md

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+---
+Title: Working with the Nodes API service
+Level: Intermediate
+---
+
 # Working with the Nodes API Service
 
 In this tutorial you will learn how to use the [`NodesApiService`](../core/nodes-api.service.md). We have developed some practical examples to show you how to interact with an instance of Alfresco Content Services without using the REST endpoints directly. With this approach the [`NodesApiService`](../core/nodes-api.service.md) is used as an abstraction layer, defined by one of the services in the ADF Core library.

docs/tutorials/working-with-nodes-js-api.md

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+---
+Title: Working with nodes using the JS-API
+Level: Intermediate
+---
+
 # Working with Nodes using the JS API
 
 In this tutorial you will learn how to use the [`AlfrescoCoreRestApi`](https://github.com/Alfresco/alfresco-js-api/tree/master/src/alfresco-core-rest-api). We have developed some practical examples to show you how to interact with an instance of Alfresco Content Services without using the REST endpoints directly. With this approach the `AlfrescoCoreRestApi` is used as an abstraction layer, defining one of the core services of the [`alfresco-api-js`](https://github.com/Alfresco/alfresco-js-api) library.