feat(billing): register enterprise billing data sources

Register data sources in provider.go and add sidebar entries in github.erb.

Author: vmvarela

github/provider.go

@@ -294,6 +294,9 @@ func Provider() *schema.Provider {
 			"github_user_external_identity":                                         dataSourceGithubUserExternalIdentity(),
 			"github_users":                                                          dataSourceGithubUsers(),
 			"github_enterprise":                                                     dataSourceGithubEnterprise(),
+			"github_enterprise_billing_premium_request_usage":                       dataSourceGithubEnterpriseBillingPremiumRequestUsage(),
+			"github_enterprise_billing_usage":                                       dataSourceGithubEnterpriseBillingUsage(),
+			"github_enterprise_billing_usage_summary":                               dataSourceGithubEnterpriseBillingUsageSummary(),
 			"github_repository_environment_deployment_policies":                     dataSourceGithubRepositoryEnvironmentDeploymentPolicies(),
 		},
 	}

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/hashicorp/terraform-plugin-sdk/v2 v2.38.2
 	github.com/hashicorp/terraform-plugin-testing v1.14.0
 	github.com/shurcooL/githubv4 v0.0.0-20260209031235-2402fdf4a9ed
+	github.com/stretchr/testify v1.10.0
 	golang.org/x/crypto v0.48.0
 	golang.org/x/oauth2 v0.35.0
 )
@@ -20,6 +21,7 @@ require (
 	github.com/agext/levenshtein v1.2.2 // indirect
 	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
 	github.com/cloudflare/circl v1.6.1 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/fatih/color v1.18.0 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/go-cmp v0.7.0 // indirect
@@ -51,6 +53,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/oklog/run v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/shurcooL/graphql v0.0.0-20240915155400-7ee5256398cf // indirect
 	github.com/vmihailenco/msgpack v4.0.4+incompatible // indirect
 	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
@@ -66,4 +69,5 @@ require (
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250818200422-3122310a409c // indirect
 	google.golang.org/grpc v1.75.1 // indirect
 	google.golang.org/protobuf v1.36.9 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

website/github.erb

@@ -100,6 +100,15 @@
             <li>
               <a href="/docs/providers/github/d/enterprise.html">github_enterprise</a>
             </li>
+            <li>
+              <a href="/docs/providers/github/d/enterprise_billing_premium_request_usage.html">github_enterprise_billing_premium_request_usage</a>
+            </li>
+            <li>
+              <a href="/docs/providers/github/d/enterprise_billing_usage.html">github_enterprise_billing_usage</a>
+            </li>
+            <li>
+              <a href="/docs/providers/github/d/enterprise_billing_usage_summary.html">github_enterprise_billing_usage_summary</a>
+            </li>
             <li>
               <a href="/docs/providers/github/d/external_groups.html">github_external_groups</a>
             </li>