feat: use provider owner as default for github_organization data source

When no 'name' is provided, fall back to the provider's configured
owner (or the authenticated user). This makes 'name' optional.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mattias-fjellstrom

github/data_source_github_organization.go

@@ -17,7 +17,8 @@ func dataSourceGithubOrganization() *schema.Resource {
 		Schema: map[string]*schema.Schema{
 			"name": {
 				Type:     schema.TypeString,
-				Required: true,
+				Optional: true,
+				Computed: true,
 			},
 			"ignore_archived_repos": {
 				Type:     schema.TypeBool,
@@ -151,7 +152,10 @@ func dataSourceGithubOrganization() *schema.Resource {
 }
 
 func dataSourceGithubOrganizationRead(ctx context.Context, d *schema.ResourceData, meta any) diag.Diagnostics {
-	name := d.Get("name").(string)
+	name := meta.(*Owner).name
+	if v, ok := d.GetOk("name"); ok {
+		name = v.(string)
+	}
 
 	client4 := meta.(*Owner).v4client
 	client3 := meta.(*Owner).v3client

website/docs/d/organization.html.markdown

@@ -17,9 +17,15 @@ data "github_organization" "example" {
 }
 ```
 
+If `name` is omitted, the provider's configured `owner` is used:
+
+```hcl
+data "github_organization" "example" {}
+```
+
 ## Argument Reference
 
-* `name` - (Required) The name of the organization.
+* `name` - (Optional) The name of the organization. Defaults to the provider's configured `owner`.
 * `ignore_archived_repos` - (Optional) Whether or not to include archived repos in the `repositories` list. Defaults to `false`.
 * `summary_only` - (Optional) Exclude the repos, members and other attributes from the returned result. Defaults to `false`.