docs: fix static check errors

Somehow we are not running static checks for a long time.
And that ended up with a lot for errors.

* Ensure debug options are valid is dropped
* fix snap links
* drop extra CONTRIBUTING.md
* reference kata-pkgsync
* move CODEOWNERS to proper place
* remove extra CODE_OF_CONDUCT.md.
* fix spell checker error on Developer-Guide.md

Signed-off-by: Peng Tao <bergwolf@hyper.sh>

src/runtime/CONTRIBUTING.md

@@ -1,5 +0,0 @@
-# Contributing
-
-## This repo is part of [Kata Containers](https://katacontainers.io)
-
-For details on how to contribute to the Kata Containers project, please see the main [contributing document](https://github.com/kata-containers/community/blob/master/CONTRIBUTING.md).

src/runtime/virtcontainers/documentation/Developers.md

@@ -51,5 +51,5 @@ This will:
 # Submitting changes
 
 For details on the format and how to submit changes, refer to the
-[Contributing](../../CONTRIBUTING.md) document.
+[Contributing](../../../../CONTRIBUTING.md) document.
 

src/runtime/virtcontainers/pkg/agent/protocols/client/client.go

@@ -1,4 +1,4 @@
-// Copyright 2017 HyperHQ Inc.
+// Copyright (c) 2017 HyperHQ Inc.
 //
 // SPDX-License-Identifier: Apache-2.0
 //