added color support for json, yaml and xml

gallery/test.json

@@ -101,5 +101,11 @@
                 }
             }
         }
+    },
+    "colors": {
+        "main": {
+            "31-28": "#FF0000",
+            "11-4": [34, 176, 43]
+        }
     }
 }

gallery/test.xml

@@ -65,4 +65,7 @@
             <description>offset register</description>
         </range>
     </structure>
+    <color structure="main" color="#FF0000" start="28" end="31" />
+    <color structure="main" color="#255961" start="4" end="11" />
+    <color structure="immediateOffset" color="89,97,37" start="4" end="11" />
 </schema>

gallery/test.yaml

@@ -71,3 +71,11 @@ structures:
       3-0:
         name: Rm
         description: offset register
+
+colors:
+  main:
+    31-28: "#3EFA6B"
+    25-23:
+      - 100
+      - 150
+      - 200