ccmake: Use type-based colors to display cache values

The colors are based on the entry type (or value for booleans),
paths and filepaths sharing the same color.

Source/CursesDialog/cmCursesColor.h

@@ -0,0 +1,24 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmCursesColor_h
+#define cmCursesColor_h
+
+class cmCursesColor
+{
+public:
+  enum Color
+  {
+    // Default color is pair 0
+    BoolOff = 1,
+    BoolOn,
+    String,
+    Path,
+    Options
+  };
+
+  static bool HasColors();
+
+  static void InitColors();
+};
+
+#endif // cmCursesColor_h