Feat/add for team subcommand

[jackboberg]

Add sub-command to cover for_team the same as codeownership gem, eg:

$ bin/codeownership for_team "Payroll"
# Code Ownership Report for `Payroll` Team

## Annotations at the top of file
/javascript/packages/PayrollFlow/index.tsx
/ruby/app/models/payroll.rb

## Team-specific owned globs
This team owns nothing in this category.

## Owner in .codeowner
/ruby/app/payroll/**/**

## Owner metadata key in package.yml
/ruby/packages/payroll_flow/**/**

## Owner metadata key in package.json
/javascript/packages/PayrollFlow/**/**

## Team YML ownership
/config/teams/payroll.yml

## Team owned gems
/gems/payroll_calculator/**/**

Bumps version to 0.2.0 with new feature!