docs: Update documentation for v2.0.0 release

[Ahnaf19]

Summary

Comprehensive documentation updates for the v2.0.0 release, covering the newly merged list command (#6) and PDF export (#7) features.

Changes

Version Bump

• package.json: 1.0.0 → 2.0.0
• core/version.js: PARSER_VERSION = '2.0.0'
• extension/manifest.json: 2.0.0, updated description to mention PDF support
• README.md: Updated version badge

Documentation Updates

docs/cli-reference.md

• Added complete documentation for jobsnap list command
  • Usage examples for all flags (--sort, --active, --expired, --tag, --group-by)
  • Output format examples with color-coded deadlines
  • Deadline color legend (red/yellow/green/gray)
• Added complete documentation for jobsnap export command
  • PDF export (default) and HTML export options
  • Example usage and output structure
  • PDF features (vector-based, ~200KB, professional styling)
  • Puppeteer requirements (auto-installed)

README.md

• Updated CLI commands table to include list and export
• Updated features table with new v2.0 capabilities:
  • List & Filter
  • PDF Export
  • Smart Dates
• Reorganized roadmap:
  • v1.0 ✅ (moved to past)
  • v2.0 ✅ (marked as Current)
  • v3.0 (Planned) - LLM summaries, CV gap analysis, tagging
  • v4.0+ (Future) - Multi-platform, Bangla support
• Updated CLI/Extension tagline to mention PDF support
• Added TODO comment for demo GIF update (deferred to future work)

Related PRs

• fix(list): parse dates for proper deadline sorting #6 - List command implementation
• feat-v2.0: PDF Export Support #7 - PDF export implementation

Test Plan

• All version numbers match (2.0.0)
• CLI reference examples are accurate
• README roadmap correctly positions v2.0 as current
• All links and formatting render correctly

Notes

• Demo GIF update is intentionally deferred (TODO comment added in README)
• All documentation changes are non-breaking
• Synced extension/core/version.js via npm run sync-extension