Update cheatsheets

tldr/sfdk-device

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sfdk device
+
+> Maintains and controls registered devices.
+> More information: <https://docs.sailfishos.org/Develop/Apps/Tutorials/Building_packages_-_advanced_techniques/>.
+
+- Display the registered devices:
+
+`sfdk device list`
+
+- Execute a command on a device by name or index:
+
+`sfdk device exec {{device-name-or-idx}} {{command}}`
+
+- Run an interactive shell on a device by name or index:
+
+`sfdk device exec {{device-name-or-idx}}`