feat: Add boundary_group data source (#503)

* refact: Move groupMemberIdsKey const

* feat: Add `boundary_group` data source

* CR

examples/data-sources/boundary_group/data-source.tf

@@ -0,0 +1,15 @@
+# Retrieve a user from the global scope
+data "boundary_group" "global_group" {
+  name = "admin"
+}
+
+# User from an org scope
+data "boundary_scope" "org" {
+  name     = "org"
+  scope_id = "global"
+}
+
+data "boundary_group" "org_group" {
+  name     = "username"
+  scope_id = data.boundary_scope.org.id
+}

examples/data-sources/boundary_user/data-source.tf

@@ -1,11 +1,9 @@
 # Retrieve a user from the global scope
-
 data "boundary_user" "global_scope_admin" {
   name = "admin"
 }
 
 # User from a org scope
-
 data "boundary_user" "org_user" {
   name     = "username"
   scope_id = data.boundary_scope.org.id