NumPy datatypes list is added

contrib/numpy/datatypes.md

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+# Numpy Data Types
+In NumPy, data types play a crcial role in representing and manipulating numerical data.
+
+Numpy supports the following data types:
+
+- `i` - integer 
+- `b` - boolean
+- `u` - unsigned integer
+- `f` - float
+- `c` - complex float
+- `m` - timedelta
+- `M` - datetime
+- `O` - object
+- `S` - string
+- `U` - unicode string
+
+## Example for integer type
+
+## Example for float type
+
+## Example for boolean type
+
+## Example for unsigned integer type
+
+## Example for complex type
+
+## Example for datetime type
+
+## Example for string type
+
+## Example for object type
+
+## Example for unicode string type
+
+## Example for timedelta type