Refactor and rename a large amount of things to cleanup meanings

asus-nb/examples/per-key-effect-2.rs

@@ -1,10 +1,10 @@
 use asus_nb::{
-    core_dbus::AuraDbusWriter,
+    core_dbus::AuraDbusClient,
     fancy::{Key, KeyColourArray},
 };
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let mut writer = AuraDbusWriter::new()?;
+    let mut writer = AuraDbusClient::new()?;
 
     let mut key_colours = KeyColourArray::new();