Init, fill, and check so empty help cannot ship quietly - #1

Summary

Hi! Parse-success on a blank help.sdl was letting people think they had a working Prohelp system when the fields that actually make help useful were still empty.

This PR tries to give authors a loop they can run locally and a ship gate they can opt into:

• prohelp init writes a shaped schema immediately (questionnaire is optional: --fill or prohelp fill)
• prohelp check reports missing summaries, discovery URLs, empty sections, and budget slips; --strict fails for CI
• Reusable workflow .github/workflows/check-schema.yml so other repos can call one job instead of inventing the pipeline
• SDL example tags are parsed and shown in Text Mode (they used to be ignored)

check still cannot reach into someone else's CI by itself — they add the job. The workflow is the one-liner for that.

Happy to adjust anything that doesn't fit the project's taste.

How to try it

1. dub build -c executable
2. prohelp init --name myapp then prohelp check / prohelp check --strict
3. prohelp fill help.sdl --set summary=Does a thing --set homepage=https://example.com --set docs=https://example.com/docs --set issues=https://example.com/issues
4. prohelp help.sdl ?

Made with Cursor