Remove unnecessary lifetimes in CommandDispatcher and Command

[urisinger]

Description

This is a small change aiming to make the usage of CommandDispatcher a little bit easier by removing all of the unnecessary lifetimes. It changes all borrowed strings in CommandDispatcher to oned ones, it also replaces all refrences to dyn traits with Arcs. Both these changes have a small preformence impact, specifically when cloning, but it should be negligable considering they arent cloned alot. if needed i cant also swap the owned strings to Arc, which could be a bit faster with frequent cloning.

Testing

There currently aren't any unit tests for commands so i have no way of verifying whether everything worked as expected now or before.

Checklist

Things need to be done before this Pull Request can be merged.

• Code is well-formatted and adheres to project style guidelines: cargo fmt
• Code does not produce any clippy warnings: cargo clippy
• All unit tests pass: cargo test
• I added new unit tests, so other people don't accidentally break my code by changing other parts of the codebase. How?(not needed, this doesnt change any logic)

[kralverde]

Code looks good at a glance, haven't tested in-game though

[Snowiiii]

Looks good.
Thanks @urisinger :D 👍

[Snowiiii]

Code looks good at a glance, haven't tested in-game though

I did, Everything works fine