Manage context restrictions

## Usage

`circleci context restriction <command> [flags]`

## Available Commands

| Command  | Description                         |
| -------- | ----------------------------------- |
| `create` | Add a restriction to a context      |
| `delete` | Delete a restriction from a context |

## Flags

Global flags: `-c, --config`, `--debug`, `--no-color`, `-q, --quiet` — see `circleci --help`.

## Details

Add and remove restrictions that control which projects and groups
can use a CircleCI context.

Restrictions scope context access to specific projects, pipeline
expressions, or VCS groups. A context with no restrictions is
accessible to all members of the organization.

