GFX control, no-tokio, no-async, dbus client refactor

- Working gfx modes <iGPU only, dGPU only, or hybrid>
- Add signal for gfx vendor change and make CLI wait for signal
- Add polling for led brightness to save to config
- Move daemon to zbus crate
- dbus client refactor
- Further dbus methods and updates
- Add basic notification user daemon and systemd service

asus-notify/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "asus-notify"
+version = "1.0.0"
+authors = ["Luke D Jones <luke@ljones.dev>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+# serialisation
+serde = "^1.0"
+serde_derive = "^1.0"
+serde_json = "^1.0"
+notify-rust = "^4.0.0"
+dbus = { version = "^0.8" }
+asus-nb = { path = "../asus-nb" }
+asus-nb-ctrl = { path = "../asus-nb-ctrl" }