crane-cp: add alias page (#14253)

* crane-cp
Signed-off-by: rvandernoort <rovervandernoort@protonmail.com>
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/common/crane-cp.md

@@ -0,0 +1,8 @@
+# crane cp
+
+> This command is an alias of `crane copy`.
+> More information: <https://github.com/google/go-containerregistry/blob/main/cmd/crane/doc/crane_copy.md>.
+
+- View documentation for the original command:
+
+`tldr crane copy`