feat: improve PDF styling and add @projects directive

[naamanu]

Summary

• Improved PDF layout with narrower margins (20 units) for more content width
• Added consistent section spacing with uppercase headers
• Consolidated skills section to single line with pipe separators
• Combined location and date on same line for experience entries
• Added @projects directive support for notable projects section
• Added CLAUDE.md for Claude Code guidance

New .rcv Format for Projects

@projects:
name: Project Name
url: https://github.com/user/project
description: Brief description of the project

Test plan

• Run cargo build to verify compilation
• Run cargo run to generate PDF
• Verify PDF has wider content area
• Verify Notable Projects section appears in output

🤖 Generated with Claude Code