feat: update config api

[neriousy]

• added update() to config class for updating & hot reloading the config on the fly
• exposed through the hono api

[brsc2909]

This would be very helpful.

[neriousy]

To be honest I did not check if I need ro reinitialize existing objects (like LSP etc) for the changes to be applied correctly.

[adamdotdevin]

Let's rip out the hot reload stuff and just expose the API for now @neriousy, @thdxr will have to figure out how to do the reload

[neriousy]

You'd like me to remove the update function? @adamdotdevin or leave it as it is?

Cause the config is overwritten but existing services may not be hot reloaded. We could use a event based reload