Add files CODEOWNERS, filled with owners per each hdl project and some IPs.
Specific code owners will be automatically added as reviewers, whenever new
PRs are opened, depending on affected folders/files from repo.
CODEOWNERS file can be different on each branch.
PULL_REQUEST_TEMPLATE.md content will populate all new PR description field.
Beside PR description, it contains a list of checkboxes, ensuring all
team members follow the same guidelines and enforce best practices.
PR Template applies for PRs against repository's default branch.
Both files were added in .github
Signed-off-by: Stefan Raus <Stefan.Raus@analog.com>