fix(code-server): use built-in JSON document formatter (#124)

Reviewed-on: https://codeberg.org/vlw/dotfiles/pulls/124

.local/share/code-server/User/settings.json

@@ -9,6 +9,9 @@
             }
         ]
     },
+    "[json]": {
+        "editor.defaultFormatter": "vscode.json-language-features"
+    },
     "workbench.colorTheme": "Default Dark Modern",
     "editor.bracketPairColorization.enabled": false,
     "git.openRepositoryInParentFolders": "never",