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/event/targetlist.rs

@@ -0,0 +1,45 @@
+// 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.
+
+use std::sync::atomic::AtomicI64;
+
+use super::targetid::TargetID;
+
+#[derive(Default)]
+pub struct TargetList {
+    pub current_send_calls: AtomicI64,
+    pub total_events: AtomicI64,
+    pub events_skipped: AtomicI64,
+    pub events_errors_total: AtomicI64,
+    //pub targets: HashMap<TargetID, Target>,
+    //pub queue:   AsyncEvent,
+    //pub targetStats: HashMap<TargetID, TargetStat>,
+}
+
+impl TargetList {
+    pub fn new() -> TargetList {
+        TargetList::default()
+    }
+}
+
+struct TargetStat {
+    current_send_calls: i64,
+    total_events: i64,
+    failed_events: i64,
+}
+
+struct TargetIDResult {
+    id: TargetID,
+    err: std::io::Error,
+}