feat(core) : isRunning function needs to be added

[sevilayerkan]

Is your feature request related to a problem? Please describe.
isRunning function needs to be added for checking docker daemon is running or not.

Describe the solution you'd like
for resolve this issue we can add a function like this:

def isRunning():
   if docker is running:
       return 1
  else:
      return 0

Additional context
This function will be used in show() and in the beginning of the program.

[sevilayerkan]

If we want to solve this while supporting cross-platform usage, we can approach to this issue in 3 ways:

1- By checking docker ps response
2- Ping docker vm ip and check its response time (this might be spesific to certain os')
3- Using commands within docker cli
4- Or using docker lib in python

Right now as solve this issue quickly we are solving with using docker ps and std.process. If not I'll try 4th approach.

https://stackoverflow.com/questions/57108228/how-to-check-if-docker-is-running-on-windows about possible solutions.

[sevilayerkan]

For 4th solution : https://docs.docker.com/engine/api/sdk/examples/#list-and-manage-containers