feat: start a project from another one's configuration

Creating a project can name one the creator owns or administers: its
statuses, transitions, types, areas, custom fields and automation rules
are copied once (paused rules stay paused; rules assigning to someone who
is not in the new project are left out). GraphQL templateProjectId, REST
template (id or key), MCP create_project template, and a select in the
web's new-project form.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/api/schema.gql

@@ -313,6 +313,11 @@ input CreateProjectInput {
   """2-10 chars, e.g. "TS" → tickets TS-1, TS-2..."""
   key: String!
   name: String!
+
+  """
+  A project you own or administer to start from: its statuses, transitions, types, areas, custom fields and automation rules are copied
+  """
+  templateProjectId: ID
 }
 
 input CreateReleaseInput {