refactor: Restructure project layout and clean up dependencies (#30)

This commit introduces a significant reorganization of the project structure to improve maintainability and clarity.

Key changes include:
- Adjusted the directory layout for a more logical module organization.
- Removed unused crate dependencies, reducing the overall project size and potentially speeding up build times.
- Updated import paths and configuration files to reflect the structural changes.

crates/ecstore/src/bucket/replication/datatypes.rs

@@ -0,0 +1,41 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Replication status type for x-amz-replication-status header
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum StatusType {
+    Pending,
+    Completed,
+    CompletedLegacy,
+    Failed,
+    Replica,
+}
+
+impl StatusType {
+    // Converts the enum variant to its string representation
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            StatusType::Pending => "PENDING",
+            StatusType::Completed => "COMPLETED",
+            StatusType::CompletedLegacy => "COMPLETE",
+            StatusType::Failed => "FAILED",
+            StatusType::Replica => "REPLICA",
+        }
+    }
+
+    // Checks if the status is empty (not set)
+    pub fn is_empty(&self) -> bool {
+        matches!(self, StatusType::Pending) // Adjust this as needed
+    }
+}

crates/ecstore/src/bucket/replication/mod.rs

@@ -0,0 +1,15 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+pub mod datatypes;