add support for list parameters

[anb0s]

For "clipboard" commands EasyShell already collects all selected resources. Then it executes variable expansion for each of them and copies this to one string and passes it to clipboard at the end.

We need some improvements here:

1. for all other commands it's not possible to do it
2. some commands (bash + git add etc.) need a list of converted resources that is resolved in the command itself

Proposed solution:

• we need new parameters or extension for support this case, e.g. append "list"
• for some tested commands (diff tools) we need indexed parameters -> acces list at index N, e.g. name it "index", related to add support for external diff and merge tools #41 and add support for resource cardinality #70
• the list elements have to be separated by delimiter that should be variable for user, e.g. "delimiter"

[anb0s]

Just investigated the solution and it needs some major changes to the "action execution" handling
--> moving to 2.2