Add monorepo support

[StarpTech]

In a monorepo it is very common to have different git tag patterns. Therefore multiple applications in a single repository.

• v1.0.0 -> ./app
• @wundergraph/[email protected] -> ./packages/sdk
• ...

It would be great to filter the changes based on a glob to generate only the changes relevant for a specific application. Ideally, we can pass multiple filter flags and it supports a glob.

whatchanged --filter 'packages/sdk'
whatchanged --filter 'packages/**'

## @wundergraph/[email protected]

### New feature:
....

[iiey]

According to above proposed option --filter packages/xyz. It should be simple to pass this additional option into git for filtering out history i.e. git log -- packages/xyz, see more git-doc.