* docs: update AWS examples. Disntinguish between alb and alb listener datasource
* more hcl highlighting
* more hcl
* fix missing end quote in docs
* docs: finish updates to AWS data source highlights
Also updates layout to distinguish some resources
* Add 'aws_vpc_peering_connection' data source.
* Changes after code review.
* Add 'accepter' and 'requester' blocks to aws_vpc_peering_connection data source output attributes.