✨ Show all provider subcommands

Usually we only show subcommands for providers that are installed.
This offers an alternative where we show all provider subcommands in the
help menu.

eg:

```bash
~ $> cnquery shell --help                                                                                                                                  x1
Allows the interactive exploration of MQL queries.

Usage:
  cnquery shell [flags]
  cnquery shell [command]

Available Commands:
  arista           Interactive shell with an Arista EOS device
  atlassian        Interactive shell with Atlassian
  aws              Interactive shell with an AWS account
  azure            Interactive shell with an Azure subscription
  container        Interactive shell with a running container or container image
  docker           Interactive shell with a running docker or docker image
  equinix          Interactive shell with an Equinix Metal organization
  filesystem       Interactive shell with a mounted file system target.
  gcp              Interactive shell with a Google Cloud project
  github           Interactive shell with a GitHub organization or repository
...
```

I still wonder if we should create a custom help for these provider
plugins that is shorter than the current list of defaults. They are
getting a bit out of hand...

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>

Author: arlimus

cli/providers/providers.go

@@ -41,6 +41,10 @@ func AttachCLIs(rootCmd *cobra.Command, commands ...*Command) error {
 		}
 	}
 
+	// We want to offer as many commands as possible,
+	// useful for e.g. help commands
+	providers.AddMissingDefaults(existing)
+
 	// Now that we know we have all providers, it's time to load them to build
 	// the remaining CLI. Probably an opportunity to optimize in the future,
 	// but fine for now to do it all.

providers/providers.go

@@ -6,7 +6,6 @@ package providers
 import (
 	"archive/tar"
 	"encoding/json"
-	"go.mondoo.com/ranger-rpc"
 	"io"
 	"net/http"
 	"os"
@@ -23,6 +22,7 @@ import (
 	"go.mondoo.com/cnquery/v9/cli/config"
 	"go.mondoo.com/cnquery/v9/providers-sdk/v1/plugin"
 	"go.mondoo.com/cnquery/v9/providers-sdk/v1/resources"
+	"go.mondoo.com/ranger-rpc"
 	"golang.org/x/exp/slices"
 )
 
@@ -160,6 +160,19 @@ func ListAll() ([]*Provider, error) {
 	return res, nil
 }
 
+// AddMissingDefaults to a list of existing providers. A system may have
+// a set of providers already installed. This command cycles through
+// the list of default providers and adds them to the list of existing
+// providers to create a full list of possible providers (existing + potential).
+// Useful when generating the CLI without having all providers installed.
+func AddMissingDefaults(existing Providers) {
+	for _, v := range DefaultProviders {
+		if _, ok := existing[v.ID]; !ok {
+			existing[v.ID] = v
+		}
+	}
+}
+
 // EnsureProvider makes sure that a given provider exists and returns it.
 // You can supply providers either via:
 //  1. connectorName, which is what you see in the CLI e.g. "local", "ssh", ...