Add NoDL tutorial prototypes for basics and dummy robot

[lsy3]

Summary

• add rendered tutorial pages for ROS 2 basics and the dummy_robot system
• add a pinned ros2/demos bootstrap plus a NoDL registration verification package
• document the remaining tutorial tracks as implementation breadcrumbs and record current NoDL workflow gaps

Verification

• built the Sphinx documentation with warnings treated as errors
• validated the three curated NoDL documents
• ran the repository pre-commit checks on the changed files
• visually checked the local rendered tutorial pages

Live ROS checks require a ROS 2 environment and are intentionally left to the tutorial bootstrap workspace.

[read-the-docs-community]

Documentation build overview

📚 nodl | 🛠️ Build #34161025 | 📁 Comparing 50a3a13 against latest (427369d)

  🔍 Preview build  

10 files changed · + 5 added · ± 5 modified

+ Added

• tutorials/basics.html
• tutorials/dummy-robot.html
• tutorials/index.html
• tutorials/nav2-controller.html
• _generated/packages/ros2nodl/describe.html

± Modified

• index.html
• schema.html
• _generated/packages/ament_nodl/overview.html
• _generated/packages/nodl_schema/overview.html
• _generated/packages/ros2nodl/overview.html