Gulshan Yadav
3e68f72743
fix: resolve 35 clippy warnings across Rust and Dart codebases
## Rust Fixes (35 warnings resolved)
- Remove unused imports (synor-vm, synor-bridge, tests)
- Remove unused variables and prefix intentional ones with underscore
- Use derive for Default implementations (6 structs)
- Replace manual is_multiple_of with standard method (3 occurrences)
- Fix needless borrows by using direct expressions (12 occurrences)
- Suppress false-positive variant assignment warnings with allow attributes
- Fix Default field initialization pattern in synor-crypto
- Rename MerklePath::to_string() to path() to avoid conflict with Display trait
## Flutter/Dart Fixes
- Add const constructors for immutable objects (8 instances)
- Remove unused imports (dart:convert, collection package, tensor.dart)
## Impact
- Reduced clippy warnings from 49 to 10 (79% reduction)
- Remaining 10 warnings are "too many arguments" requiring architectural refactoring
- All library code compiles successfully
- Code quality and maintainability improved