Correctly Handle Language Server Timeout When Quitting

[thecoolwinter]

Description

There has been work done to ensure CodeEdit cleans up language servers correctly on quit, this fixes a few final bugs with that system.

• Changes the withTimeout call's try to try? in the AppDelegate so a thrown timeout error still allows execution to continue.
• Removes an unnecessary withTimeout in the language server shutdown code.
• Ensures withTimeout always cancels all child tasks on either an error or a return value.

Related Issues

Checklist

• I read and understood the contributing guide as well as the code of conduct
• The issues this PR addresses are related to each other
• My changes generate no new warnings
• My code builds and runs on my machine
• My changes are all related to the related issue above
• I documented my code

Screenshots