Guard auto cargo watch behind a config option

editors/code/src/config.ts

@@ -9,6 +9,7 @@ export class Config {
     public enableEnhancedTyping = true;
     public raLspServerPath = RA_LSP_DEBUG || 'ra_lsp_server';
     public showWorkspaceLoadedNotification = true;
+    public enableCargoWatchOnStartup = true;
 
     private prevEnhancedTyping: null | boolean = null;
 
@@ -68,5 +69,12 @@ export class Config {
             this.raLspServerPath =
                 RA_LSP_DEBUG || (config.get('raLspServerPath') as string);
         }
+
+        if (config.has('enableCargoWatchOnStartup')) {
+            this.enableCargoWatchOnStartup = config.get<boolean>(
+                'enableCargoWatchOnStartup',
+                true
+            );
+        }
     }
 }