Hypewire 0.9.0 beta

This release is packed with quite a few quality-of-life improvements.

File backups: the first time you save in a session, Hypewire will keep the old version as a backup. The max number of backups is configurable in preferences.
Auto-saving: project will now automatically save any changes every few minutes. Disable or configure this in preferences.
Node swapping: you're now able to swap nodes while keeping their settings intact. We've also split out a few nodes that had multiple "modes" into separate nodes.
OBS integration revamp: we've made wide improvements to the OBS integration internals to fix nodes sometimes forgetting their settings.
Dropdown searching: all node dropdowns now have a search box, to make finding options in long lists easier.