- Updated all `github.com/luispater/CLIProxyAPI/internal/...` imports to point to `github.com/luispater/CLIProxyAPI/v5/internal/...`.
- Adjusted `go.mod` to specify `module github.com/luispater/CLIProxyAPI/v5`.
- Updated imports and function calls to use `filepath` across all token storage implementations and server entry point.
- Ensured consistent handling of directory and file paths for improved portability.