* perf: utilize smartstring for string handling
- Updated various modules to replace standard String with smartstring::alias::String for improved performance and memory efficiency.
- Adjusted string manipulations and conversions throughout the codebase to ensure compatibility with the new smartstring type.
- Enhanced readability and maintainability by using `.into()` for conversions where applicable.
- Ensured that all instances of string handling in configuration, logging, and network management leverage the benefits of smartstring.
* fix: replace wrap_err with stringify_err for better error handling in UWP tool invocation
* refactor: update import path for StringifyErr and adjust string handling in sysopt
* fix: correct import path for CmdResult in UWP module
* fix: update argument type for execute_sysproxy_command to use std::string::String
* fix: add missing CmdResult import in UWP platform module
* fix: improve string handling and error messaging across multiple files
* style: format code for improved readability and consistency across multiple files
* fix: remove unused file
- Renamed `cmds` module to `cmd` for better naming consistency
- Reorganized command modules into separate files under src/cmd/
- Updated all imports and references to use the new module name
- Fixed missing dependency in webdav.rs to reference core::backup
- Updated tray module to use new cmd namespace
- Improved uwp.rs module structure using platform-specific implementations
- Removed unnecessary imports from various command files