docs: add core dump file docs

docs/docs-content/clusters/edge/local-ui/host-management/download-core-dump.md

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+---
+sidebar_label: "Download Core Dump Files"
+title: "Download Core Dump Files"
+description: "Instructions for downloading core dump files from Local UI."
+hide_table_of_contents: false
+sidebar_position: 130
+tags: ["edge"]
+---
+
+If you have configured your applications to direct core dumps to the folder `/var/log/files` in the event of a crash,
+you can download the core dump files from Local UI for diagnostic purposes.
+
+## Prerequisites
+
+- You have configured your applications to direct core dump files to `/var/log/files` in the event of a crash. The steps
+  to do this vary by application, but the path must be exactly `/var/log/files`. This is the only path where files can
+  be downloaded from Local UI.
+
+- An operational Edge host installed in the `airgap` installation mode. For more information, refer to
+  [Installer Reference](../../edge-configuration/installer-reference.md).
+
+- Network access to your Edge host's Local UI port. The default port is 5800.
+
+## Procedure
+
+1. Log in to Local UI. For more information, refer to [Access Local UI Console](./access-console.md).
+
+2. From the left **Main Menu**, click on **Diagnostics**.
+
+3. Click on the **Files** tab.
+
+4. Check the files you'd like to download.
+
+5. Click the **Download** button in the upper right corner.
+
+## Validate
+
+View the files you downloaded in your downloads folder. Confirm that they are the core dump files from your application.