Update documentation for unified multi-source scraping (v2.0.0)

Major documentation update explaining the new unified scraping system that combines documentation + GitHub + PDF sources in a single skill with automatic conflict detection.

## Changes:

**README.md:**
- Update version badge to v2.0.0
- Add "Unified Multi-Source Scraping" to Key Features section
- Add comprehensive Option 5 section showing:
  - Problem statement (documentation drift)
  - Solution with code example
  - Conflict detection types and severity levels
  - Transparent reporting with side-by-side comparison
  - List of advantages (identifies gaps, catches changes, single source of truth)
  - Available unified configs
  - Link to full guide (docs/UNIFIED_SCRAPING.md)

**CLAUDE.md:**
- Update Current Status to v2.0.0
- Add "Major Release: Unified Multi-Source Scraping" in Recent Updates
- Update configs count from 11/11 to 15/15 (added 4 unified configs)
- Add new "Unified Multi-Source Scraping" section under Core Commands
- Include command examples and feature highlights
- Explain what makes unified scraping special

**QUICKSTART.md:**
- Add Option D: Unified Multi-Source to Step 2
- Add unified configs to Available Presets section
- Show react_unified, django_unified, fastapi_unified, godot_unified examples

## Value:
This documentation update explains how unified scraping helps developers:
- Mix documentation + code in one skill
- Automatically detect conflicts (missing_in_docs, missing_in_code, signature_mismatch)
- Get transparent side-by-side comparisons with ⚠️ warnings
- Identify documentation gaps and outdated docs
- Create a single source of truth combining both sources

Related to: Phase 7-11 unified scraper implementation (commit 5d8c7e3)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

QUICKSTART.md

@@ -27,6 +27,13 @@ python3 cli/doc_scraper.py --interactive
 python3 cli/doc_scraper.py --name react --url https://react.dev/
 ```
 
+**Option D: Unified Multi-Source (NEW - v2.0.0)**
+```bash
+# Combine documentation + GitHub code in one skill
+python3 cli/unified_scraper.py --config configs/react_unified.json
+```
+*Detects conflicts between docs and code automatically!*
+
 ### Step 3: Enhance SKILL.md (Recommended)
 
 ```bash
@@ -63,6 +70,12 @@ python3 cli/doc_scraper.py --config configs/django.json
 
 # FastAPI
 python3 cli/doc_scraper.py --config configs/fastapi.json
+
+# Unified Multi-Source (NEW!)
+python3 cli/unified_scraper.py --config configs/react_unified.json
+python3 cli/unified_scraper.py --config configs/django_unified.json
+python3 cli/unified_scraper.py --config configs/fastapi_unified.json
+python3 cli/unified_scraper.py --config configs/godot_unified.json
 ```
 
 ---