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/crypto/src/jwt/encode.rs

@@ -0,0 +1,26 @@
+// 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 jsonwebtoken::{Algorithm, EncodingKey, Header};
+
+use crate::Error;
+use crate::jwt::Claims;
+
+pub fn encode(token_secret: &[u8], claims: &Claims) -> Result<String, Error> {
+    Ok(jsonwebtoken::encode(
+        &Header::new(Algorithm::HS512),
+        claims,
+        &EncodingKey::from_secret(token_secret),
+    )?)
+}