feat: migrate to reed-solomon-simd only implementation

- Remove reed-solomon-erasure dependency and all related code
- Simplify ReedSolomonEncoder from enum to struct with SIMD-only implementation
- Eliminate all conditional compilation (#[cfg(feature = ...)])
- Add instance caching with RwLock-based encoder/decoder reuse
- Implement reset mechanism to avoid unnecessary allocations
- Ensure thread safety with proper cache management
- Update documentation and benchmark scripts for SIMD-only approach
- Apply code formatting across all files

Breaking Changes:
- Removes support for reed-solomon-erasure feature flag
- API remains compatible but implementation is now SIMD-only

Performance Impact:
- Improved encoding/decoding performance through SIMD optimization
- Reduced memory allocations via instance caching
- Enhanced thread safety and concurrency support

ecstore/src/config/com.rs

@@ -1,4 +1,4 @@
-use super::{storageclass, Config, GLOBAL_StorageClass};
+use super::{Config, GLOBAL_StorageClass, storageclass};
 use crate::disk::RUSTFS_META_BUCKET;
 use crate::error::{Error, Result};
 use crate::store_api::{ObjectInfo, ObjectOptions, PutObjReader, StorageAPI};

ecstore/src/config/mod.rs

@@ -5,7 +5,7 @@ pub mod storageclass;
 
 use crate::error::Result;
 use crate::store::ECStore;
-use com::{lookup_configs, read_config_without_migrate, STORAGE_CLASS_SUB_SYS};
+use com::{STORAGE_CLASS_SUB_SYS, lookup_configs, read_config_without_migrate};
 use lazy_static::lazy_static;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;