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/maintenance/README.md

@@ -9,6 +9,7 @@ This directory contains operational maintenance guides for keeping Charon runnin
 **When to use:** Docker build fails with GeoLite2-Country.mmdb checksum mismatch
 
 **Topics covered:**
+
 - Automated weekly checksum verification workflow
 - Manual checksum update procedures (5 minutes)
 - Verification script for checking upstream changes
@@ -16,6 +17,7 @@ This directory contains operational maintenance guides for keeping Charon runnin
 - Alternative sources if upstream mirrors are unavailable
 
 **Quick fix:**
+
 ```bash
 # Download and update checksum automatically
 NEW_CHECKSUM=$(curl -fsSL "https://github.com/P3TERX/GeoLite.mmdb/raw/download/GeoLite2-Country.mmdb" | sha256sum | cut -d' ' -f1)
@@ -34,6 +36,7 @@ Found a maintenance issue not covered here? Please:
 3. **Update this index** with a link to your guide
 
 **Format:**
+
 ```markdown
 ### [Guide Title](filename.md)