Document one-command Builder install

[0xprogrammable]

Summary

• make the repository-only gh skill install 0xprogrammable/programmable command the primary interactive quick start
• document the skill-name shortcut for users who want to preselect the Builder
• retain exact protected-release pins for reproducible review work
• update the skills overview from v0.1.0 to the current v0.1.1 release

Verification

• exercised the repository-only interactive install through skill discovery against v0.1.1
• node --test scripts/test/check-documentation-links.test.mjs
• node scripts/check-documentation-links.mjs
• node skills/programmable-v4-hook-builder/scripts/verify-skill.mjs
• git diff --check