feat/sg: add 'sg enterprise' commands for Cody Analytics (#63414)

Closes CORE-194 - added a bit more than strictly needed here, but this
PR adds:

- `sg enterprise subscription list`
- `sg enterprise subscription set-instance-domain`
- `sg enterprise update-membership`
- `sg enterprise license list`

## Test plan

<img width="1055" alt="image"
src="https://github.com/sourcegraph/sourcegraph/assets/23356519/48ec40b0-fbac-4513-9ad8-fc3174774ada">


![image](https://github.com/sourcegraph/sourcegraph/assets/23356519/806fd054-806b-4ecb-a969-32900112f368)

Author: bobheadxi

deps.bzl

@@ -54,6 +54,7 @@ go_library(
         "//dev/sg/buf",
         "//dev/sg/ci",
         "//dev/sg/dependencies",
+        "//dev/sg/enterprise",
         "//dev/sg/internal/analytics",
         "//dev/sg/internal/background",
         "//dev/sg/internal/backport",

dev/sg/BUILD.bazel

@@ -0,0 +1,25 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "enterprise",
+    srcs = ["sg_enterprise.go"],
+    importpath = "github.com/sourcegraph/sourcegraph/dev/sg/enterprise",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//dev/sg/internal/category",
+        "//dev/sg/internal/std",
+        "//dev/sg/sams/samsflags",
+        "//lib/enterpriseportal/subscriptions/v1:subscriptions",
+        "//lib/enterpriseportal/subscriptions/v1/v1connect",
+        "//lib/errors",
+        "//lib/pointers",
+        "@com_connectrpc_connect//:connect",
+        "@com_github_sourcegraph_sourcegraph_accounts_sdk_go//:sourcegraph-accounts-sdk-go",
+        "@com_github_sourcegraph_sourcegraph_accounts_sdk_go//scopes",
+        "@com_github_urfave_cli_v2//:cli",
+        "@org_golang_google_protobuf//encoding/protojson",
+        "@org_golang_google_protobuf//types/known/fieldmaskpb",
+        "@org_golang_x_exp//maps",
+        "@org_golang_x_oauth2//:oauth2",
+    ],
+)