Revamped event API

This is the first release that is doing breaking changes, so I think it is appropriate to bump the mid version for the first time. There are no breaking changes in request API though.

For the breaking changes:

• event.NewEventClient() renamed to event.NewClient() and event.MustEventClient() renamed to event.MustClient() to make the API more symmetric (e.g.: same as the requests API)
• event.Receive() now receives a ctx (context) parameter, that allows proper cancellation if needed
• event.Subscribe() is now a method of EventClient struct, and also receives a context

What's Changed

• Improve event testing by @thiagokokada in #18
• request_test: check the Hyprland version in NixOS test VM by @thiagokokada in #19
• event: create subscribeOnce to allow testing loop handling by @thiagokokada in #20
• Add event.Close() by @thiagokokada in #21
• Refactor event API by @thiagokokada in #22
• helpers: add GetSocket() by @thiagokokada in #23
• helpers/helpers_test: add test for when HYPRLAND_INSTANCE_SIGNATURE is unset by @thiagokokada in #24
• Refactor event API again by @thiagokokada in #25
• event/event_test: add TestSubscribe by @thiagokokada in #26

Full Changelog: v0.0.4...v0.1.0