Created a file for "Basics of Raspberry Pi Stuffs" (#20150)

* Created a file for "Basics of Raspberry Pi Stuffs" 

The code contains two parts:
First part is simply blinking led (Blink time can be set by time.sleep(x) x for the number of seconds)
Second part is for pwm control for led brightness

* Update RaspberryPiBasics.py

* reformatted two 2 space indention with title corr.

guide/english/python/raspberry-pi-basics/index.md

@@ -0,0 +1,38 @@
+---
+title: Rasberry PI Basics
+---
+
+## Rasberry PI Basics Example
+```python
+## CODE THAT MAKES AN LED GLOW FOR 2 SECONDS
+import time
+import RPi.GPIO as GPIO
+while True:
+  GPIO.output(2, GPIO.HIGH
+  time.sleep(1)
+  GPIO.output(2, GPIO.LOW) 
+  time.sleep(1)
+
+## CODE FOR PWM CONTROL OF LED BRIGHNTESS
+import RPi.GPIO as GPIO from time
+import sleep led_pin = 2
+
+GPIO.setmode(GPIO.BCM)
+GPIO.setup(led_pin, GPIO.OUT)
+
+pwm = GPIO.PWM(led_pin, 100)
+pwm.start(0)
+
+try:
+  while True:
+    for x in range(100):
+      pwm.ChangeDutyCycle(x)
+      sleep(0.01)
+    for x in range(100, 0, -1):
+      pwm.ChangeDutyCycle(x)
+      sleep(0.01)
+
+except KeyboardInterrupt:
+  pwm.stop()
+  GPIO.cleanup()
+```