have context sensitive parameterized commands for open file, show type etc. with proper API

currently our custom cheatsheet commands requires the project name(s) to be known upfront. We should make them less reliant on project names and if at all possible have the project name calculated based on the project the cheatsheet file is open in.

The commands should also actually be commands with named parameters so the order of parameters does not matter and we should make sure these have a good and long term API so cheatsheets will continue to work well in the future.