Fixed textures for Pick-Place can and cereal box (ARISE-Initiative#288)

* adding textures and msh files

* fixing cereal, bread, and can textures

Co-authored-by: awesome-aj0123 <abhishekjoshinj@gmail.com>

robosuite/models/assets/objects/can.xml

@@ -1,7 +1,7 @@
 <mujoco model="can">
   <asset>
-    <mesh file="meshes/can.stl" name="can_mesh"/>
-    <texture file="../textures/can.png" name="tex-can"/>
+    <mesh file="meshes/can.msh" name="can_mesh"/>
+    <texture file="../textures/soda.png" name="tex-can" type="2d"/>
     <material name="coke" reflectance="0.7" texrepeat="5 5" texture="tex-can" texuniform="true"/>
   </asset>
   <worldbody>

robosuite/models/assets/objects/cereal.xml

@@ -1,7 +1,7 @@
 <mujoco model="cereal">
   <asset>
-    <mesh file="meshes/cereal.stl" name="cereal_mesh"/>
-    <texture type="cube" file="../textures/cereal.png" rgb1="1 1 1" name="tex-cereal"/>
+    <mesh file="meshes/cereal.msh" name="cereal_mesh"/>
+    <texture type="2d" file="../textures/cereal.png" rgb1="1 1 1" name="tex-cereal"/>
     <material name="cereal" reflectance="0.5" texrepeat="1 1" texture="tex-cereal" texuniform="false"/>
   </asset>
   <worldbody>

robosuite/models/assets/objects/lemon.xml

@@ -1,6 +1,6 @@
 <mujoco model="lemon">
   <asset>
-    <mesh file="meshes/lemon.stl" name="lemon_mesh" scale="1.5 1 1"/>
+    <mesh file="meshes/lemon.msh" name="lemon_mesh" scale="1.5 1 1"/>
     <texture file="../textures/lemon.png" type="2d" name="tex-lemon"/>
     <material name="lemon" reflectance="0.7" texrepeat="60 50" texture="tex-lemon" texuniform="true"/>
   </asset>

robosuite/models/assets/objects/meshes/bread.mtl

@@ -1,7 +1,7 @@
 # Blender MTL File: 'None'
 # Material Count: 1
 
-newmtl Material.002
+newmtl Material.007
 Ns 225.000000
 Ka 1.000000 1.000000 1.000000
 Kd 0.800000 0.800000 0.800000