fix_route_params_parse

[hpp0hpp]

fix the issue: #130

[rknell]

Thank you for the PR addressing issue #130. However, the current implementation introduces several test failures: 1. Route parameter matching is broken for: - Custom typed parameters - Basic route parameters - Parameter extraction. While using Uri.decodeFull might fix the non-ASCII character decoding issue, it breaks the existing route parameter functionality. We need to: 1. Keep the special handling for slashes (which the original DecodeMode.AllButSlash provided) 2. Fix the non-ASCII character decoding 3. Maintain backward compatibility with existing route parameter behavior. Could you please update the PR to: 1. Add a test case for the non-ASCII character scenario from issue #130 2. Fix the implementation to handle both ASCII and non-ASCII cases correctly 3. Ensure all existing tests pass. Let me know if you need any help with the implementation.