Update cheatsheets

tldr/sfdk-package

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sfdk package
+
+> Executes package creation build step.
+> More information: <https://docs.sailfishos.org/Develop/Apps/Tutorials/Building_packages_-_advanced_techniques/>.
+
+- Create a package:
+
+`sfdk package`
+
+- Create a package without executing the check section in RPM SPEC file:
+
+`sfdk package --no-check`
+
+- Create and sign a package:
+
+`sfdk package --sign`