Create category overview pages for learn's restructure (#15091)

Co-authored-by: Ilya Mashchenko <ilya@netdata.cloud>

docs/category-overview-pages/accessing-netdata-dashboards.md

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+# Accessing Netdata Dashboards
+
+This section contains documentation on how you can access the Netdata Agent's dashboards, and the Netdata Cloud's dashboards.

docs/category-overview-pages/build-the-netdata-agent-yourself.md

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+# Build the Netdata Agent yourself
+
+This section contains documentation on all the ways that you can build the Netdata Agent.

docs/category-overview-pages/install-netdata-on-embedded-systems.md

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+# Install Netdata on Embedded Systems Overview
+
+This section contains documentation for installation methods when it comes to Embedded Systems.

docs/category-overview-pages/install-with-a-cicd-provisioning-system.md

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+# Install with a CI/CD Provisioning System Overview
+
+This section contains documentation on all the installation methods through a CI/CD system.

docs/category-overview-pages/machine-learning-and-assisted-troubleshooting.md

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+# Machine Learning and Assisted Troubleshooting Overview
+
+This section contains documentation regarding Netdata's troubleshooting and machine learning features.

docs/category-overview-pages/maintenance-operations-on-netdata-agents.md

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+# Maintenance operations on Netdata Agents Overview
+
+This section provides information on various actions you can take when maintaining a Netdata Agent.

docs/category-overview-pages/metrics-streaming-and-replication.md

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+# Metrics Streaming and Replication Overview
+
+This section contains documentation to help you understand and configure streaming and replication with Netdata.

docs/category-overview-pages/misc-overview.md

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-<!--
-title: "Miscellaneous material"
-sidebar_label: "Miscellaneous"
-custom_edit_url: "https://github.com/netdata/netdata/edit/master/docs/category-overview-pages/misc-overview.md"
-description: "Available integrations in Netdata"
-learn_status: "Published"
-learn_rel_path: "Miscellaneous"
-sidebar_position: 110
--->
-
 # Miscellaneous material
 
-This section contains temporary material that no longer belongs in our official documentation, and will
-be moved to other locations. We keep it here to make it accessible while we create the new articles. 
-
-
-
-
-
+This section contains material that will be moved to new locations as we see fit. We keep it here to make it accessible while we make these changes.

docs/category-overview-pages/monitor-your-infrastructure.md

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+# Monitor your Infrastructure Overview
+
+This section contains documentation on how you can use Netdata Cloud and it's features to monitor your entire infrastructure.

docs/category-overview-pages/netdata-apis.md

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+# Netdata APIs Overview
+
+This section contains information about Netdata's APIs.
+
+You can access the Netdata Agent's API through swagger UI [here](/api).

docs/category-overview-pages/netdata-architecture.md

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+# Netdata Architecture Overview
+
+This section's purpose is to explain the architecture of Netdata, the role of the Agent and the Cloud, and more.

docs/category-overview-pages/netdata-dashboards-and-visualizations.md

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+# Netdata Dashboards and Visualizations Overview
+
+This section provides documentation about all the visualization operations, features and insights that Netdata provides.

docs/category-overview-pages/optimizing-metrics-database.md

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+# Optimizing Metrics Database Overview
+
+This section contains documentation to help you understand how the metrics DB works, understand the key features and configure them to suit your needs.