feat: Add URL-specific crawler configurations for multi-URL crawling

Implement dynamic configuration selection based on URL patterns to optimize crawling for different content types. This feature enables users to apply different crawling strategies (PDF extraction, content filtering, JavaScript execution) based on URL matching patterns.

Key additions:
- Add url_matcher and match_mode parameters to CrawlerRunConfig
- Implement is_match() method supporting string patterns, functions, and mixed lists
- Add MatchMode enum for OR/AND logic when combining multiple matchers
- Update AsyncWebCrawler.arun_many() to accept List[CrawlerRunConfig]
- Add select_config() method to dispatchers for runtime config selection
- First matching config wins, with fallback to default

Pattern matching supports:
- Glob-style strings: *.pdf, */blog/*, *api*
- Lambda functions: lambda url: 'github.com' in url
- Mixed patterns with AND/OR logic for complex matching

This enables optimal per-URL configuration:
- PDFs: Use PDFContentScrapingStrategy without JavaScript
- Blogs: Apply content filtering to reduce noise
- APIs: Skip JavaScript, use JSON extraction
- Dynamic sites: Execute only necessary JavaScript

Breaking changes: None - fully backward compatible

docs/md_v2/core/browser-crawler-config.md

@@ -209,7 +209,13 @@ class CrawlerRunConfig:
     - The maximum number of concurrent crawl sessions.  
     - Helps prevent overwhelming the system.
 
-14. **`display_mode`**:  
+14. **`url_matcher`** & **`match_mode`**:  
+    - Enable URL-specific configurations when used with `arun_many()`.
+    - Set `url_matcher` to patterns (glob, function, or list) to match specific URLs.
+    - Use `match_mode` (OR/AND) to control how multiple patterns combine.
+    - See [URL-Specific Configurations](../api/arun_many.md#url-specific-configurations) for examples.
+
+15. **`display_mode`**:  
     - The display mode for progress information (`DETAILED`, `BRIEF`, etc.).  
     - Affects how much information is printed during the crawl.