fix(skill): enforce explicit user confirmation before CLI promotion

[ronit-1404]

fixes: #223

Description

Enforces a strict separation between private iteration and promotion in the webcmd-adapter-author skill.

Previously, instructions like "build a working adapter" were interpreted as implicit permission to promote the CLI into the main repo. This caused unintended repo-level changes (plugin creation, registration, installation) without explicit user approval.

This update:

• Makes promotion a clearly gated step
• Requires explicit user confirmation before any repo-level actions
• Adds a mandatory checkpoint prompt before promotion
• Clarifies that building/testing in ~/.webcmd/clis/<site>/ fully satisfies adapter creation

This aligns implementation with the intended behavior defined in the skill.

Related issue:
Fixes implicit CLI promotion without explicit user consent

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 🌐 New site adapter
• 📝 Documentation
• ♻️ Refactor
• 🔧 CI / build / tooling

Checklist

• I ran the checks relevant to this PR
• I updated tests or docs if needed
• I included output or screenshots when useful

Adapter Notes

• Updated generated or lean docs when command discoverability changed
• Used positional args for the command's primary subject unless a named flag is clearly better
• Normalized expected adapter failures to CliError subclasses instead of raw Error

Screenshots / Output

N/A (documentation-only change)

[github-actions]

🟢 No documentation gap found — medium confidence

The automated review found no documentation gap in the supplied changes.

This review is advisory and does not block merging.