Provide reliable local setup flows for monorepo templates #360

Summary

Make the source-based template workflow in the /templates dashboard reliable for a monorepo. The current View Source action is useful for discovery, but the README/setup flow does not consistently let a user fetch and run the selected example.

Required changes

• Add a template-specific local setup flow (for example, a Copy setup command action and/or matching expanded README instructions) for the React SDK Demo, Social Media demo, Python SDK Demo, and Kanban Board.
  • Standalone examples may use a sparse checkout command.
  • Instructions must include the actual cloned repository directory before changing into the example directory.
• Correct examples/python-sdk-demo/README.md:
  • After cloning https://github.com/geturbackend/urBackend.git, change into the cloned repository directory before examples/python-sdk-demo.
• Correct examples/social-demo/README.md:
  • Use the canonical https://github.com/geturbackend/urBackend.git repository URL.
  • Correct the cd path to include the cloned repository directory.
  • Update the documentation link to the canonical repository.
• Resolve/document Kanban’s non-standalone dependency:
  • examples/sdk-kanban/server/package.json declares @urbackend/sdk as file:../../../sdks/urbackend-sdk.
  • Either make the setup command sparse-check out both examples/sdk-kanban and sdks/urbackend-sdk, or replace the local file dependency with an appropriate published SDK version.
• Keep the dashboard metadata in apps/web-dashboard/src/pages/Templates.jsx, the expanded README content, and each example README consistent.

Affected areas

• apps/web-dashboard/src/pages/Templates.jsx
• examples/python-sdk-demo/README.md
• examples/social-demo/README.md
• examples/sdk-kanban/README.md
• examples/sdk-kanban/server/package.json

Acceptance criteria

• A user can follow the UI-provided or README-provided instructions to obtain and start each advertised source-based template without guessing paths.
• All clone and documentation links use geturbackend/urBackend.
• Python and Social setup commands work from a clean shell after cloning.
• Kanban setup succeeds with its SDK dependency available, or no longer relies on a repository-local SDK path.
• The template cards and their linked documentation describe the same supported workflow.

Backlinks

• PR: feat(devex): add project templates, Python SDK demo, quickstart scrip… #359
• Originating review discussion: feat(devex): add project templates, Python SDK demo, quickstart scrip… #359 (comment)
• Requested by: @yash-pouranik