make command dispatcher mutable

[kralverde]

Description

Makes the command dispatcher mutable via tokio RWLock as a part of the Server struct

There is also a massive over usage of lifetimes in the command codebase that makes it overly constraining. This will not be addressed in this PR.

Testing

Opened the console and ran commands

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?

[vyPal]

imo looks good, do you want to merge this independently and I will just sync the changes with the plugins branch, or should I try to copy these changes and have them as part of the plugins merge request when it's ready?

[kralverde]

Im fine with merging as-is, I havent done a whole lot of testing to make sure i havent broke anything tho..

[Snowiiii]

Looks good, After testing some commands including /help and i haven't found any bugs.
Thanks @kralverde