Resolve "Simulator implementation"

Closes #6 (closed).

• This is a sub-package for simulating FR3 robot with MuJoCo in ROS1 environment.
• Some minor features (e.g. Add parameters for package, Add MuJoCo UI utilities, Integration with real robot HW for digital twin, ...) can be further developed.
  • This will be described in issues.

include/fr3_ros1_mujoco_interface/fr3_ros1_mujoco_interface.hpp

-#ifndef ROS1_MUJOCO_INTERFACE_HPP_
-#define ROS1_MUJOCO_INTERFACE_HPP_
+#ifndef fr3_ros1_mujoco_interface_HPP_
+#define fr3_ros1_mujoco_interface_HPP_
 
 /* ROS1 Packages */
 #include "ros/ros.h"
@@ -28,7 +28,7 @@ using namespace std::chrono_literals;
 namespace mj = ::mujoco;
 namespace mju = ::mujoco::sample_util;
 
-class MuJoCoRosOneInterface
+class FR3MuJoCoRosOneInterface
 {
 public:
   // ! this struct should be declared as PUBLIC
@@ -48,8 +48,8 @@ public:
   };
   std::shared_ptr<MuJoCoGuiCommand> gui_cmd_ptr_;
 
-  MuJoCoRosOneInterface(mj::Simulate * sim, ros::NodeHandle & nh);
-  // ~MuJoCoRosOneInterface();
+  FR3MuJoCoRosOneInterface(mj::Simulate * sim, ros::NodeHandle & nh);
+  // ~FR3MuJoCoRosOneInterface();
 
 private:
   const int queue_size_ = 20;
@@ -91,4 +91,4 @@ public:
   }
 };
 
-#endif  // ROS1_MUJOCO_INTERFACE_HPP_
\ No newline at end of file
+#endif  // fr3_ros1_mujoco_interface_HPP_
\ No newline at end of file