extmod/modusocket: Add read/write stream methods to socket object.
extmod/modusocket: Add read/write stream methods to socket object.

Following other socket implementations.

adafruit/circuitpython,bvernoux/micropython,bvernoux/micropython,bvernoux/micropython,bvernoux/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,bvernoux/micropython,adafruit/circuitpython