[WIP] check if handle works in caddy when forward_auth is used

[Copilot]

Investigation of issue: check if handle_errors works with forward_auth in Caddy

Plan:

• Understand the current issue with handle_errors and forward_auth
• Research Caddy documentation for forward_auth and handle_errors interaction
• Test the current behavior to confirm the issue
• Determine if this is a configuration issue or a Caddy limitation
• Update documentation if needed or fix configuration
• Create focused tests to validate the fix

The issue claims that Caddy's handle_errors directive doesn't work when forward_auth is used, making the README examples incorrect. Need to verify this behavior and either fix the configuration or update documentation accordingly.

Fixes #1.

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[FarisZR]

@copilot use the integration test environment under dev for testing this.
if using handle is possible with forward_auth, then update the docs.
if not remove any examples using handle_error and other handle directives.

[FarisZR]

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