config: send server-side capabilities to config

jay-config/src/_private/client.rs

@@ -4,7 +4,9 @@ use {
     crate::{
         _private::{
             bincode_ops,
-            ipc::{ClientMessage, InitMessage, Response, ServerMessage, WorkspaceSource},
+            ipc::{
+                ClientMessage, InitMessage, Response, ServerFeature, ServerMessage, WorkspaceSource,
+            },
             logging, Config, ConfigEntry, ConfigEntryGen, PollableId, WireMode, VERSION,
         },
         exec::Command,
@@ -1178,6 +1180,14 @@ impl Client {
                     }
                 }
             }
+            ServerMessage::Features { features } => {
+                for feat in features {
+                    match feat {
+                        ServerFeature::NONE => {}
+                        _ => {}
+                    }
+                }
+            }
         }
     }
 

jay-config/src/_private/ipc.rs

@@ -13,6 +13,14 @@ use {
     std::time::Duration,
 };
 
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+#[serde(transparent)]
+pub struct ServerFeature(u16);
+
+impl ServerFeature {
+    pub const NONE: Self = Self(0);
+}
+
 #[derive(Serialize, Deserialize, Debug)]
 pub enum ServerMessage {
     Configure {
@@ -62,6 +70,9 @@ pub enum ServerMessage {
         writable: bool,
         res: Result<(), String>,
     },
+    Features {
+        features: Vec<ServerFeature>,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]

jay-config/src/lib.rs

@@ -38,7 +38,8 @@
     clippy::uninlined_format_args,
     clippy::len_zero,
     clippy::single_char_pattern,
-    clippy::single_char_add_str
+    clippy::single_char_add_str,
+    clippy::single_match
 )]
 
 use {