Revert merging of server and client repository

src/backend/client/instruments.rs

@@ -0,0 +1,18 @@
+use super::Backend;
+use crate::database::Instrument;
+use anyhow::Result;
+
+impl Backend {
+    /// Get all available instruments from the server.
+    pub async fn get_instruments(&self) -> Result<Vec<Instrument>> {
+        let body = self.get("instruments").await?;
+        let instruments: Vec<Instrument> = serde_json::from_str(&body)?;
+        Ok(instruments)
+    }
+
+    /// Post a new instrument to the server.
+    pub async fn post_instrument(&self, data: &Instrument) -> Result<()> {
+        self.post("instruments", serde_json::to_string(data)?).await?;
+        Ok(())
+    }
+}