Add CODEOWNERS file

The CODEOWNERS[1] file define individuals or teams that are responsible
for code in a repository.

People with write permissions for the repository can create or edit the
CODEOWNERS file and be listed as code owners. People with admin or owner
permissions can require that pull requests have to be approved by code
owners before they can be merged.

How this change the development flow?

- When a pull request is created, owners of file touched by the pull
  request are added automatically as reviewers. This improves the
  experience for new contributors.

- Using branch protection we can require that at least one of the owners
  will approve the pull request before it can be merged.

- New contributors can learn who owns the code that want to change.

Issues:
- Need a second owner for some rules, both for another  review, and to
  avoid blocking merge if a single code owner is not available.

[1] https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners

Fixes: RamenDR#1766
Signed-off-by: Nir Soffer <[email protected]>

CODEOWNERS

@@ -0,0 +1,38 @@
+# SPDX-FileCopyrightText: The RamenDR authors
+# SPDX-License-Identifier: Apache-2.0
+
+# For supported syntax see docs:
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Default owners if there is no more specific rule.
+*   @ShyamsundarR @BenamarMk
+
+# volrep
+/internal/controllers/vrg_volrep*.go    @ShyamsundarR @ELENAGER
+
+# volsync
+/internal/controllers/volsync/          @BenamarMk @ELENAGER
+/internal/controllers/vrg_volsync*.go   @BenamarMk @ELENAGER
+
+# cephfs consistency groups
+# TODO: second owner?
+/internal/controllers/cephfscg/     @BenamarMk
+
+# Metrics
+/docs/metrics.md                    @rakeshgm @ShyamsundarR
+/internal/controllers/metrics.go    @rakeshgm @ShyamsundarR
+/internal/controllers/cel/          @rakeshgm @ShyamsundarR
+
+# Kube object protection
+/docs/recipe.md                             @raghavendra-talur @ShyamsundarR
+/docs/krp.md                                @raghavendra-talur @ShyamsundarR
+/internal/controllers/kubeobjects/          @raghavendra-talur @ShyamsundarR
+/internal/controllers/vrg_kubeobjects*.go   @raghavendra-talur @ShyamsundarR
+/internal/controllers/vrg_recipe*.go        @raghavendra-talur @ShyamsundarR
+
+# Testing
+/test/                          @nirs @raghavendra-talur
+/e2e/                           @nirs @raghavendra-talur
+/docs/testing.md                @nirs @raghavendra-talur
+/docs/devel-quick-start.md      @nirs @raghavendra-talur
+/docs/user-quick-start.md       @nirs @raghavendra-talur