feat: YAML config support

[disq]

to go with https://github.com/cloudquery/cq-provider-sdk and cloudquery/cloudquery#887

go run main.go init aws --config config.yml creates this:

cloudquery:
    providers:
        - name: aws
          version: latest
    connection:
        type: postgres
        username: postgres
        password: pass
        host: localhost
        port: 5432
        database: postgres
        sslmode: disable
providers:
    # provider configurations
    aws:
        # Optional. by default assumes all regions
        # regions:
        #   - us-east-1
        #     us-west-2
        # Optional. Enable AWS SDK debug logging.
        #   aws_debug: false
        # The maximum number of times that a request will be retried for failures. Defaults to 10 retry attempts.
        # max_retries: 10
        # The maximum back off delay between attempts. The backoff delays exponentially with a jitter based on the number of attempts. Defaults to 30 seconds.
        # max_backoff: 30
        #  
        # list of resources to fetch
        resources:
            - accessanalyzer.analyzers
            - acm.certificates
#...

[roneli]

LGTM