chore: Enhance documentation for E2E testing:

- Added clarity and structure to README files, including recent updates and getting started sections.
- Improved manual verification documentation for CrowdSec authentication, emphasizing expected outputs and success criteria.
- Updated debugging guide with detailed output examples and automatic trace capture information.
- Refined best practices for E2E tests, focusing on efficient polling, locator strategies, and state management.
- Documented triage report for DNS Provider feature tests, highlighting issues fixed and test results before and after improvements.
- Revised E2E test writing guide to include when to use specific helper functions and patterns for better test reliability.
- Enhanced troubleshooting documentation with clear resolutions for common issues, including timeout and token configuration problems.
- Updated tests README to provide quick links and best practices for writing robust tests.

docs/features/proxy-headers.md

@@ -69,22 +69,26 @@ X-Forwarded-Host preserves the original domain:
 Your backend must trust proxy headers from Charon. Common configurations:
 
 **Node.js/Express:**
+
 ```javascript
 app.set('trust proxy', true);
 ```
 
 **Django:**
+
 ```python
 SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 USE_X_FORWARDED_HOST = True
 ```
 
 **Rails:**
+
 ```ruby
 config.action_dispatch.trusted_proxies = [IPAddr.new('10.0.0.0/8')]
 ```
 
 **PHP/Laravel:**
+
 ```php
 // In TrustProxies middleware
 protected $proxies = '*';