crane/gcrane: add pages (#13853)

pages/common/crane-index-filter.md

@@ -0,0 +1,20 @@
+# crane index filter
+
+> Modifies a remote index by filtering based on platform.
+> More information: <https://github.com/google/go-containerregistry/blob/main/cmd/crane/doc/crane_index_filter.md>.
+
+- Modify remote index:
+
+`crane index filter`
+
+- Specify the platform(s) to keep from base in the form os/arch{{/variant}}{{:osversion}}{{,<platform>}}:
+
+`crane index filter --platform {{platform1 platform2 ...}}`
+
+- Tag to apply to resulting image:
+
+`crane index filter {{-t|--tags}} {{tag_name}}`
+
+- Display help:
+
+`crane index filter {{-h|--help}}`