docs: split reference docs to separate files

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/reference/buildx_imagetools_create.md

@@ -0,0 +1,45 @@
+# `buildx imagetools create [OPTIONS] [SOURCE] [SOURCE...]`
+
+Options:
+
+| Flag | Description |
+| --- | --- |
+|      --append            | Append to existing manifest
+|      --dry-run           | Show final image instead of pushing
+|  -f, --file stringArray  | Read source descriptor from file
+|  -t, --tag stringArray   | Set reference for new image
+
+## Description
+
+Imagetools contains commands for working with manifest lists in the registry.
+These commands are useful for inspecting multi-platform build results.
+
+Create creates a new manifest list based on source manifests. The source
+manifests can be manifest lists or single platform distribution manifests and
+must already exist in the registry where the new manifest is created. If only
+one source is specified create performs a carbon copy.
+
+### `--append`
+
+Append appends the new sources to an existing manifest list in the destination.
+
+### `--dry-run`
+
+Do not push the image, just show it.
+
+### `-f, --file FILE`
+
+Reads source from files. A source can be a manifest digest, manifest reference,
+or a JSON of OCI descriptor object.
+
+### `-t, --tag IMAGE`
+
+Name of the image to be created.
+
+Examples:
+
+```console
+docker buildx imagetools create --dry-run alpine@sha256:5c40b3c27b9f13c873fefb2139765c56ce97fd50230f1f2d5c91e55dec171907 sha256:c4ba6347b0e4258ce6a6de2401619316f982b7bcc529f73d2a410d0097730204
+
+docker buildx imagetools create -t tonistiigi/myapp -f image1 -f image2 
+```