feat(settings): enable shell keybindings passthrough and JSON schema downloads

Allow terminal to forward keybindings to the shell for better
compatibility with shell programs. Enable JSON schema downloads for
improved JSON validation support.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

settings.json

@@ -332,7 +332,7 @@
   "terminal.integrated.tabs.title": "${sequence}",
   "terminal.integrated.scrollback": 50000,
   "terminal.integrated.enableKittyKeyboardProtocol": true,
-  "terminal.integrated.sendKeybindingsToShell": false,
+  "terminal.integrated.sendKeybindingsToShell": true,
   "terminal.integrated.shellIntegration.enabled": true,
   //
   // ===========================================================================
@@ -726,6 +726,7 @@
       "url": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/manifest.json"
     }
   ],
+  "json.schemaDownload.enable": true,
   //
   // ===========================================================================
   // MARK: Lang: JavaScript