- Remove unused `Infallible` import
- Add `ParseProgIdKindError` for better ProgId parsing error handling
- Implement `BlankProgId` variant for empty ProgId strings
- Add `ExtKey::new` and `ProgIdKey::new` constructors
- Add `as_inner` methods to `ExtKey` and `ProgIdKey`
- Replace `to_string()` calls with `as_inner().to_string()`
- Update error type from `BlankStringError` to `BlankPathError`
- Rename `BlankStringError` to `BlankPathError` with updated message
- Update `blank_path_guard` return type and error handling
- Remove `Display` and `FromStr` implementations from `ExtKey` and `ProgIdKey`
- Add comprehensive error types for registry operations
- Implement ProgIdKind enum with Display and FromStr traits
- Create ApplicationVisitor and ClassesVisitor structs
- Add ExtKey methods for linking, unlinking and querying ProgId
- Implement ProgIdKey creation and deletion in registry
- Add safe delete function to prevent accidental registry cleanup
- Introduce Display and FromStr implementations for ExtKey and ProgIdKey
- Organize registry access through scoped and viewed key opening
- Enable setting default "Open With" verbs for file extensions
- Support both user and system level registry modifications
- Add `getrandom` dependency for UUID v4 feature
- Enable UUID v4 feature in `Cargo.toml`
- Implement `Clsid::with_random()` for generating random CLSIDs
- Improve `Clsid::new()` to accept `&Uuid` directly
- Update `Clsid::from_str()` to use `uuid::fmt::Braced` for stricter parsing
- Add comprehensive tests for valid and invalid CLSID strings
- Fix minor typo in test assertion code
- Enhance documentation comments for CLSID struct and error type
- Add Ext struct for handling file extensions with validation
- Implement ProgId struct following Microsoft's suggested format
- Create Clsid struct for handling CLSID with UUID parsing
- Add ExpandString struct for environment variable expansion
- Include comprehensive tests for new structs and parsing logic
- Remove duplicate ExpandString implementation from windows.rs
- Organize code regions for better readability and maintenance
- Replace `Default::default()` with `std::ptr::null_mut()` or `std::ptr::null()` for FFI calls
- Change `WideCStr::from_ptr` to `WideStr::from_ptr` for better safety
- Remove redundant error variants in `LoadStrRcError` and `ExpandEnvVarError`
- Reorder imports for better readability
- Add test cases for `StrRc` and `ExpandString` utilities
- Improve documentation comments for icon loading functions
