Refactor syscall modules to use async/await patterns

- Updated `DisplaySyscall` to use `tokio::io::AsyncWriteExt` for asynchronous text output.
- Refactored `FsSyscall` to read files asynchronously with offset and length handling.
- Modified `MemorySyscall` to use `tokio::task::spawn_blocking` for database operations, allowing async access to SQLite.
- Enhanced `NetworkSyscall` to utilize `reqwest` for HTTP requests, replacing the previous `curl` command execution.
- Improved `ProcessSyscall` to manage subprocesses with async tasks for stdin, stdout, and stderr handling.
- Updated `TimerSyscall` to simplify timer management.
- Adjusted plugin implementations for better async support and error handling.
- Added `tokio-stream` and `tracing-subscriber` dependencies to `Cargo.toml` for enhanced async stream handling and logging.

core/agentsd/src/syscall/timer.rs

@@ -52,12 +52,10 @@ impl TimerSyscall {
             timers.lock().unwrap().remove(&tid);
         });
 
-        self.timers.lock().unwrap().insert(
-            timer_id.clone(),
-            TimerEntry {
-                handle,
-            },
-        );
+        self.timers
+            .lock()
+            .unwrap()
+            .insert(timer_id.clone(), TimerEntry { handle });
         timer_id
     }