[codex] Fix schema docs picoschema examples

[groksrc]

Summary

Closes #16.

Updates the schema documentation examples so picoschema modifier descriptions are placed inside the modifier parentheses instead of after the value. This fixes enum examples like status?(enum): [active, inactive, alumni], current relationship status, which standard YAML parsers reject because the trailing description follows a flow sequence.

Also normalizes related array examples in the schema guide, project documentation guide, and AI assistant reference, and syncs the lockfile after npm install so the local install/build path has the missing Nuxt CLI peer entry.

Validation

• Parsed all yaml fences under content/**/*.md with Ruby/Psych after dedenting fenced snippets.
• Confirmed the local rendered pages show the corrected examples and no longer show the old invalid strings.
• git diff --check
• npm run build exits 0. It still emits existing prerender/icon warnings for unrelated missing links/assets.