common/open, open.fish: add page (#10848)

pages/common/open.fish.md

@@ -0,0 +1,25 @@
+# open
+
+> Opens files, directories, and URIs with default applications.
+> This command is available through `fish` on operating systems without the built-in `open` command (e.g. Haiku and macOS).
+> More information: <https://fishshell.com/docs/current/cmds/open.html>.
+
+- Open a file with the associated application:
+
+`open {{path/to/file.ext}}`
+
+- Open all the files of a given extension in the current directory with the associated application:
+
+`open {{*.ext}}`
+
+- Open a directory using the default file manager:
+
+`open {{path/to/directory}}`
+
+- Open a website using the default web browser:
+
+`open {{https://example.com}}`
+
+- Open a specific URI using the default application that can handle it:
+
+`open {{tel:123}}`