feat: expose in-memory cache builder and cache entry (#705)

Signed-off-by: MrCroxx <[email protected]>

foyer/src/prelude.rs

@@ -12,15 +12,17 @@
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
 
-use ahash::RandomState;
 pub use common::{
     buf::{BufExt, BufMutExt},
     code::{Key, StorageKey, StorageValue, Value},
     event::EventListener,
     range::RangeBoundsExt,
     tracing::TracingConfig,
 };
-pub use memory::{CacheContext, EvictionConfig, FetchState, FifoConfig, LfuConfig, LruConfig, S3FifoConfig, Weighter};
+pub use memory::{
+    Cache, CacheBuilder, CacheContext, CacheEntry, EvictionConfig, FetchState, FifoConfig, LfuConfig, LruConfig,
+    S3FifoConfig, Weighter,
+};
 pub use storage::{
     AdmissionPicker, AdmitAllPicker, Compression, Dev, DevExt, DevOptions, DeviceStats, DirectFileDevice,
     DirectFileDeviceOptions, DirectFileDeviceOptionsBuilder, DirectFsDevice, DirectFsDeviceOptions,
@@ -35,8 +37,3 @@ pub use crate::hybrid::{
     writer::{HybridCacheStorageWriter, HybridCacheWriter},
 };
 use crate::{common, memory, storage};
-
-/// In-memory cache.
-pub type Cache<K, V, S = RandomState> = memory::Cache<K, V, S>;
-/// In-memory cache builder.
-pub type CacheBuilder<K, V, S> = memory::CacheBuilder<K, V, S>;