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/s3select-query/src/metadata/base_table.rs

@@ -0,0 +1,31 @@
+// 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::Arc;
+
+use datafusion::common::Result as DFResult;
+use datafusion::datasource::listing::ListingTable;
+
+use crate::data_source::table_source::TableHandle;
+
+use super::TableHandleProvider;
+
+#[derive(Default)]
+pub struct BaseTableProvider {}
+
+impl TableHandleProvider for BaseTableProvider {
+    fn build_table_handle(&self, provider: Arc<ListingTable>) -> DFResult<TableHandle> {
+        Ok(TableHandle::External(provider))
+    }
+}