Support Target Selectors in more Command

[Zoriot]

Feature description

Target Selectors should work in every Command, making it much easier to use.
If it`s easier to implement it could support the execute as / at vanilla command.
Currently it doesn't work at least for that commands:

• heal
• strike
• vanish (Like the most important)

How the feature is useful

Because it behaves more vanilla like and constant with other commands. Also Many people will enjoy that.