Add auto-pair and internet-sharing

[dadav]

With the old plugin the pairing had to be done by hand. Now pwnagotchi can do it by himself!!
Also, internet-sharing (change the route + resolv.conf) has been added.

Motivation and Context

• I have raised an issue to propose this change (required)

See #277

How Has This Been Tested?

Tested by myself.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [x ] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ x] My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have signed-off my commits with git commit -s